Liabilities / Assets
26th percentile
Higher debt load relative to assets than 26% of similar nonprofits.
EIN 46-2714742 • 501(c)3 • Baltimore, MD
Profile
MBB seeks to bridge the literacy gap through increased access to quality age-appropriate books in homes, classrooms and community settings. We do so by equipping those we serve with the power to choose age-appropriate books to build their own libraries.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
26th percentile
Higher debt load relative to assets than 26% of similar nonprofits.
Liabilities / Revenue
13th percentile
Higher debt load relative to revenue than 13% of similar nonprofits.
Net Margin
37th percentile
Higher net margin than 37% of similar nonprofits.
Top Officer Pay
34th percentile
Higher top officer pay than 34% of similar nonprofits.
Top officer pay equals 1.9% of source-year revenue.
Asset Growth
38th percentile
Faster asset growth than 38% of similar nonprofits.
Revenue Growth
44th percentile
Faster revenue growth than 44% of similar nonprofits.
Assets
Up$928,887
Up $6,009 (+0.7%) from 2023
Liabilities
Up$18,379
Up $7,961 (+76%) from 2023
Net Assets
Down$910,508
Down $1,952 (-0.2%) from 2023
Revenue
Up$4,777,627
Up $188,687 (+4.1%) from 2023
Expenses
Up$4,779,578
Up $429,050 (+9.9%) from 2023
Net Income
Down-$1,951
Down $240,363 (-101%) from 2023
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
MBB seeks to bridge the literacy gap through increased access to quality age-appropriate books in homes, classrooms and community settings. We do so by equipping those we serve with the power to choose age-appropriate books to build their own libraries.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Inventories for Sale or Use | $655,332 | $641,333 | ▼ $13,999 |
| Cash and Non-Interest-Bearing Accounts | $91,829 | $136,615 | ▲ $44,786 |
| Land, Buildings, and Equipment, Net | $157,887 | $133,326 | ▼ $24,561 |
| Prepaid Expenses and Deferred Charges | - | $14,342 | - |
| Pledges and Grants Receivable | $2,663 | - | - |
| Other Notes and Loans Receivable, Net | - | $1,000 | - |
| Accounts Receivable | $11,980 | $-916 | ▼ $12,896 |
| Total Assets | $922,878 | $928,887 | ▲ $6,009 |
| Other Assets Total | $3,187 | $3,187 | → $0 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $9,218 | $17,179 | ▲ $7,961 |
| Other Liabilities | $1,200 | $1,200 | → $0 |
| Total Liabilities | $10,418 | $18,379 | ▲ $7,961 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $851,449 | $849,497 | ▼ $1,952 |
| Net Assets With Donor Restrictions | $61,011 | $61,011 | → $0 |
| Total Net Assets Fund Balance | $912,460 | $910,508 | ▼ $1,952 |
| Total Liabilities and Net Assets / Fund Balance | $922,878 | $928,887 | ▲ $6,009 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Equipment | $82,878 | $148,264 | $231,142 |
| Leasehold Improvements | $50,448 | $124,318 | $174,766 |
| Land | $0 | - | - |
| Name | Title | Full / Part Time | Base | Total |
|---|---|---|---|---|
| Mark Feiring | Executive Director | FT | $88,400 | $88,400 |
| Name | Title |
|---|---|
| Jennifer Bell-ellwanger | Board Chair |
| Sarah Hackney CPA | Treasurer, Finance Chair |
| Angelissa Mcarthur | Board Member |
| Blair Temple | Board Member |
| Brandon Bacote | Board Member |
| Cassandra Sullivan-wright | Board Member |
| Darian Senn-carter | Board Member |
| Deborah Sharpe | Board Member |
| Doug Woodward Cfp | Board Member |
| Kristin N Dodson | Board Member |
| Lindsey Sullivan | Board Member |
| Madison Boris | Board Member |
| Nelly Sai Palm | Board Member |
| Stephanie Shack | Board Member |
| Tanya Turner | Board Member |
| Line Item | Amount |
|---|---|
| Grants and Similar Amounts Paid | $4,208,600 |
| Salaries, Compensation, and Employee Benefits | $294,346 |
| Other Expenses | $276,632 |
| Total Fundraising Expense | $25,395 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Grants to Domestic Orgs | $4,208,600 | - | - | $4,208,600 |
| Other Salaries and Wages | $115,848 | $66,199 | $1,839 | $183,886 |
| Current Officers, Directors, Trustees, and Key Employees | $55,692 | $31,824 | $884 | $88,400 |
| All Other Expenses | $73,671 | $5,131 | $16 | $78,818 |
| Occupancy | $48,978 | $15,885 | $1,324 | $66,187 |
| Insurance | $25,070 | $4,424 | $0 | $29,494 |
| Depreciation Depletion | $19,046 | $6,177 | $515 | $25,738 |
| Office Expenses | $13,345 | $12,317 | $0 | $25,662 |
| Payroll Taxes | $16,325 | $5,294 | $441 | $22,060 |
| Advertising | $0 | $0 | $20,364 | $20,364 |
| Fees for Services Accounting | $0 | $15,476 | $0 | $15,476 |
| Other Expenses | $1,384 | $0 | $0 | $1,384 |
| Total Functional Expenses | $4,591,313 | $162,870 | $25,395 | $4,779,578 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Liability | Amount |
|---|---|
| Security Deposit | $1,200 |
“Executive director will review before filing”
“Reviewed by board at meetings”
“NON APPLICABLE”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | true |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 9218 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 17179 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 11980 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | -916 |
| IRS990/AcctCompileOrReviewBasisGrp/ConsolAndSepBasisFinclStmtInd | 0 | X |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | MBB seeks to bridge the literacy gap through increased access to quality age-appropriate books in homes, classrooms and community settings. We do so by equipping those we serve with the power to choose age-appropriate books to build their own libraries. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 20364 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 20364 |
| IRS990/AllOtherContributionsAmt | 0 | 5261828 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 16 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 5131 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 73671 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 78818 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | false |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | MARK FEIRING |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4105981771 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 1794 UNION AVE |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | BALTIMORE |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MD |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 21211 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 91829 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 136615 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 884 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 31824 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 55692 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 88400 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CostOfGoodsSoldAmt | 0 | 1044623 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 5262473 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 4208600 |
| IRS990/CYInvestmentIncomeAmt | 0 | 0 |
| IRS990/CYOtherExpensesAmt | 0 | 276632 |
| IRS990/CYOtherRevenueAmt | 0 | -509774 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 24928 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -1951 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 294346 |
| IRS990/CYTotalExpensesAmt | 0 | 4779578 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 25395 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 4777627 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | true |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 515 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 6177 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 19046 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 25738 |
| IRS990/Desc | 0 | HOME LIBRARY PROGRAM - PROVIDING BOOKS FOR THE HOME LIBRARY OF BALTIMORE ELEMENTARY LOW INCOME STUDENTS. THE PROGRAM SPECIFICALLY TARGETS K - 2ND GRADE STUDENTS AND PROVIDES 10 SELF-SELECTED, AGE APPROPRIATE BOOKS. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 61011 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 61011 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 13 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 1147828 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 15476 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 15476 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 2.30 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.15 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 0.25 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 14 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | MARK FEIRING |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | JENNIFER BELL-ELLWANGER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | STEPHANIE SHACK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | KRISTIN N DODSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | DOUG WOODWARD CFP |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | SARAH HACKNEY CPA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MADISON BORIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | LINDSEY SULLIVAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ANGELISSA MCARTHUR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | DARIAN SENN-CARTER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | DEBORAH SHARPE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | TANYA TURNER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | BRANDON BACOTE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | BLAIR TEMPLE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | NELLY SAI PALM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | CASSANDRA SULLIVAN-WRIGHT |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 88400 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | EXECUTIVE DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | BOARD CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TREASURER, FINANCE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | BOARD MEMBER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | false |
| IRS990/FormationYr | 0 | 2013 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/ConsolidatedBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 15 |
| IRS990/GrantAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 4208600 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 4208600 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | true |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 5937573 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 107983 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 542189 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 15 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 0 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 4424 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 25070 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 29494 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 655332 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 641333 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 272582 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 157887 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 133326 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 405908 |
| IRS990/LegalDomicileStateCd | 0 | MD |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 115323 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembershipDuesAmt | 0 | 645 |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | false |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | MBB seeks to bridge the literacy gap through increased access to quality age-appropriate books in homes, classrooms and community settings. We do so by equipping those we serve with the power to choose age-appropriate books to build their own libraries. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 912460 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 910508 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | -502434 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | -502434 |
| IRS990/NetRentalIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | -7340 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | -7340 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 851449 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 849497 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NoncashContributionsAmt | 0 | 4875527 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 1324 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 15885 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 48978 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 66187 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 12317 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 13345 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 25662 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 3187 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 3187 |
| IRS990/OtherExpensesGrp/Desc | 0 | REPAIRS & MAINTNENANCE |
| IRS990/OtherExpensesGrp/Desc | 1 | OUTSIDE SERVCES |
| IRS990/OtherExpensesGrp/Desc | 2 | GIFTS |
| IRS990/OtherExpensesGrp/Desc | 3 | EQUIPMENT RENTAL |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 12 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 143 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 442 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 12597 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 315 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 1384 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 597 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 12597 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 315 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 1384 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 1200 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 1200 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 1839 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 66199 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 115848 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 183886 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 1000 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 441 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 5294 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 16325 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 22060 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 2663 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 14342 |
| IRS990/PrincipalOfficerNm | 0 | MARK FEIRING |
| IRS990/PriorPeriodAdjustmentsAmt | 0 | -1 |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | BOOK BANK PROGRAM - DISTRIBUTE BOOKS TO FAMILIES, TEACHERS, SCHOOLS AND ORGANIZATION THROUGHOUT MARYLAND. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 3443485 |
| IRS990/ProgSrvcAccomActy2Grp/GrantAmt | 0 | 0 |
| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 3946855 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 5176760 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 3879800 |
| IRS990/PYOtherExpensesAmt | 0 | 241450 |
| IRS990/PYOtherRevenueAmt | 0 | -587820 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 238412 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 229278 |
| IRS990/PYTotalExpensesAmt | 0 | 4350528 |
| IRS990/PYTotalRevenueAmt | 0 | 4588940 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -1951 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | -7340 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 1315618 |
| IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearAmt | 0 | 5262473 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt | 0 | 5176760 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 5336574 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 5299296 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 5770433 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt | 0 | 26845536 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearAmt | 0 | 542189 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus1YearAmt | 0 | 470099 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus2YearsAmt | 0 | 552723 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus3YearsAmt | 0 | 523330 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus4YearsAmt | 0 | 423872 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/TotalAmt | 0 | 2512213 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0.00000 |
| IRS990ScheduleA/InvestmentIncomePYPct | 0 | 0.00000 |
| IRS990ScheduleA/OtherSupportSumAmt | 0 | 0 |
| IRS990ScheduleA/PubliclySupportedOrg509a2Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0 |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 1.00000 |
| IRS990ScheduleA/PublicSupportPY509Pct | 0 | 1.00000 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 29357749 |
| IRS990ScheduleA/SubstAndDsqlfyPrsnsTotGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/SubstantialContributorsAmtGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft509Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY509Ind | 0 | X |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearAmt | 0 | 5804662 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus1YearAmt | 0 | 5646859 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 5889297 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 5822626 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 6194305 |
| IRS990ScheduleA/Total509Grp/TotalAmt | 0 | 29357749 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/TotalAmt | 0 | 29357749 |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 82878 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 148264 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 231142 |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 0 |
| IRS990ScheduleD/LandGrp/InvestmentCostOrOtherBasisAmt | 0 | 0 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 50448 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 124318 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 174766 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 1200 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | SECURITY DEPOSIT |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 133326 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 1200 |
| IRS990ScheduleI/GrantRecordsMaintainedInd | 0 | true |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990ScheduleM/AnyPropertyThatMustBeHeldInd | 0 | false |
| IRS990ScheduleM/ReviewProcessUnusualNCGiftsInd | 0 | false |
| IRS990ScheduleM/ThirdPartiesUsedInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | EXECUTIVE DIRECTOR WILL REVIEW BEFORE FILING |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | REVIEWED BY BOARD AT MEETINGS |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | NON APPLICABLE |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Pt VI, Line 11b |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Pt VI, Line 12c |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Pt VI, Line 8b |
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