Autobiographical, biographical, and personal material, correspondence, public appearance material, holograph notes, typescripts, design layout, galleys, illustrations, holograph journal, research material, and photocopies of page proofs. The Collection includes correspondence concerning Beyond another door (1977); The fisherman and the bird (1982); Jason and the money tree (1974); Journey to America (1970); The Mark of Conte (1976); The no-return trail (1978); Reigning cats and dogs (1978); Rita, the weekend rat (1971); Roanoke (1973); A season for unicorns (1986); Smile like a plastic daisy (1984); Who owns the moon? (1973); and The year of sweet senior insanity (1982). There are holograph notes and/or holograph journals for Beyond another door; The Mark of Conte; The no-return trail; Reigning cats and dogs; A season for unicorns; Smile like a plastic daisy; and The year of sweet of senior insanity. The Collection includes typescripts for Beyond another door; Journey to America; The Mark of Conte; The no-return trail; Reigning cats and dogs; Roanoke; A season for unicorns; Smile like a plastic daisy; and The year of sweet senior insanity. There are galleys for Journey to America; The Mark of Conte; The no-return trail; and A season for unicorns. There is a design layout for Beyond another door and illustrations for The Mark of Conte. The Collection holds research material for Reigning cats and dogs and Smile like a plastic daisy. There are photocopies of page proofs for Smile like a plastic daisy. Finally, the Collection contains a photocopied article by Levitin and an unidentified typescript.