Editions of "Dirk Gently's Holistic Detective Agency"

Hardcover

English language

Published Jan. 14, 1990 by Random House Value Publishing.

Audio Cassette

English language

Published June 25, 2001 by New Millennium Audio.

247 pages

English language

Published June 25, 1988 by Pan Books.

Audio Cassette

English language

Published June 1, 1993 by Simon & Schuster Audio.