The Leon Rubin Collection of Milton Caniff Reading Room Files include planning and meeting notes, flyers, brochures, memos, clippings, news articles, and other materials pertaining to programs, initiatives, press and publicity of the cartoon library. Files include information on the First and Second Festivals of Cartoon Art, Walt Kelly's 75th Birthday Celebration, Steve Canyon's retirement, support from the Hearst Foundation, and the library's founding donor, Milton Caniff. Mr. Rubin provided a typed inventory of the files that can be found in the scope and content notes at the folder level.

This collection contains correspondence, publications, and other administrative records, including correspondence from Charles Schultz, the Inks serial publication, and articles on the cartoon museum itself. Materials date from 1979 to 2019.