The ACLS Humanities E-Book contains 5,153 full-text titles of both in-print and out-of-print books, with up to 400 titles added each year. It is a collaboration of the American Council of Learned Societies, its constituent members and nearly 95 publishers.
A select number of XML titles are also available as part of a project evaluating the effectiveness of the XML format.
A review of the collection from Reviews in History is available.
Content is selected by an advisory board composed of leading scholars, editors, librarians, and university administrators.
Between 300 and 400 titles are added each year.