The Overbrook Press Records contain correspondence, office files, and production files documenting the operations and publications of the Overbrook Press. The records also hold small group of Frank Altschul's personal papers, a collection of printed material, mostly ephemera, published by peer presses, professional and private associations and clubs, and a group of type specimens from American and European typefounders. The Production Files form the most significant part of the records, and contain original and carbon typescripts, manuscripts, printed sources or copies of source text, designs and layout pages, dummies, proofs, and galleys; some files hold correspondence, published reviews, and final copies of the publications as well as original artwork, silkscreen stencils, bookbinding stamps, and a collection of paper samples. Correspondents include various authors and illustrators including T. M. Cleland, W. A. Dwiggins, William Einstein, Jean Hugo, Bruce Rogers, and Rudolph Ruzicka. Also present are the photoengravings used for printing illustrations and decorations in press publications. The latest item in the collection is an Overbrook Press tribute broadside which was printed by Altschul's nephew Charles Altschul at Yale University in 1979.