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Infobase Publishing is an American publisher of reference book titles and textbooks geared towards the North American library, secondary school, and university-level curriculum markets. Infobase operates a number of prominent imprints, including Facts On File, Films for the Humanities & Sciences, Cambridge Educational, Chelsea House (which also serves as the imprint for the special collection series, "Bloom's Literary Criticism" under the direction of literary critic Harold Bloom), and Ferguson Publishing.
The private equity firm Veronis Suhler Stevenson bought Facts on File in 2005. Infobase bought Films for the Humanities & Sciences in 2007 and the World Almanac in 2009. 
As well as nonfiction works in print, Infobase and its imprints publish a selection of works in digital, audio-visual and online database formats.