The Leo Katcher collection includes manuscripts and research material.
The collection includes manuscripts for Katcher's full-length works, such as The Big Bankroll (Harper and Brothers, 1959), Earl Warren: A Political Biography (McGraw-Hill, 1967), Post-Mortem: The Jews in Germany Today (Delacorte, 1968), The Blind Cave, and Hot Pursuit (Atheneum, 1971). Also present is "The Wood Hawk," an original story that Katcher sold to Columbia Pictures (later titled "They Rode Together").
Extensive research documentation for Post Mortem and Earl Warren is collected, as well. Materials consist of news clips, tear sheets, brochures, mimeographs, and more. Research folder headings include subjects such as "War Crimes," "Spiegel and Anti-Defamation League Reports," "Library of Congress Lists and Biographies," and "Supreme Court – General," among many others. Additional materials are collected in yearly folders dated between 1934 and 1966. Preliminary research for a book about Norway is also present.