New books and old, along with more than 100 periodicals are available. The collection of 225,000 titles as well as new books are described in the Library's Bulletin. The Bulletin is published three times annually and available to members of the Library. Over the past five years, the Library has greatly expanded its archival function, collecting and processing the records of a number of Congregational agencies and local churches, which are frequently researched by, or on behalf of, both historians and genealogists. The oldest of those records goes back to 1669 and the founding of Boston's Old South Church.
Libraries are oddities in the world of mission efforts.
Think of the Congregational Library as a benevolent agency. It serves a vital role to people and leaders of Congregational Christian Churches. Multiply that savings by as many as ten books read by a typical borrower in a year, and the Library's claim to be a vital agency becomes apparent. Remember also, that many Christian books simply are not stocked by public libraries.