The Adler Archive of Underground Comix is a collection of underground comix, books, and archival newspaper and magazine clippings on cartoonists and ephemera. The underground comix portion of the collection includes ~250 items published between the 1960s and 2000s by artists such as Robert Crumb, Justin Green, Bill Griffith, Aline Kominsky Crumb, Harvey Pekar, Dori Seda, Art Speigelman and many others, as well as anthology titles such as Arcade Comics Revue, RAW, Weirdo, Young Lust and Zap. The rare books in the Adler Archive are located in Special Collections and include examples of early to mid twentieth century cartoonists such as Charles Addams, Helen Hokinson, and Myron Waldman, and the majority of the ~280 books are located in the Fleet Library’s main collection.

The clipping files include comic strips, interviews, news stories, feature stories, advertisements, press releases, book reviews, movie reviews, tv reviews, parodies, cover illustrations, promotional postcards, catalogs, photographs, and obituaries. The range of publications spans national titles, local press, and underground newspapers, specialty publications devoted to comics such as The Comics Journal, Juxtapoz, etc., the National Lampoon, Playboy, and some foreign language publications. These items were mostly published between the late Sixties and the present day.