Contains manuscripts and/or tear sheets for 33 short stories and novels, two anthologies, correspondence, and fanzines and periodicals.

Contains working notes and rough drafts of his novels: "Rakehells of heaven", "The last star ship", "The pollinators of Eden", "The rough beast", and "The organ bank farm", tapes of two CSUF lectures, an interview with Willis McNelly.

Collection contains the shooting script and an original tribble from the Star Trek episode "The trouble with tribbles", as well as a tape of the show. Also includes typescripts of three novels: "In the deadlands", "Yesterday's children", "With a finger in my I", and "A day for damnation".

The collection contains manuscripts from the Perry Rhodan series, Famous Monsters series, and Charles Nuetzel. Other notable items are short story manuscripts by John K. Aiken and Cleve Cartmill, among others. Ackerman's own articles and papers are included as well as literary correspondence dated 1968 - 2008.

Collection contains manuscripts for 4 novels and the "Berserker" series of short stories published in Galaxy Magazine.

Collection contains manuscripts from two novels: But the secret sits and Deeper than the darkness as well as 10 short story manuscripts.

The collection contains manuscripts, books, and the authors correspondence and papers covering 15 anthologies, 22 novels, and dozens of short stories and articles.

Contains manuscript materials for 10 novels as well as one folder of correspondence.

Contains the galley proofs for the novel "Frostworld and dreamfire".

Collection contains manuscripts for four Agent of T.E.R.R.A. novels: The flying saucer gambit, The golden goddess gambit, The emerald elephant gambit, and The time trap gambit.