Douglas Adams books in order

19 books in the catalogue, about 144 hours of reading in all; the shortest takes 3 hours and the longest 18 hours.

2 series and 7 standalone books in the catalogue.

The Hitchhiker's Guide to the Galaxy

6 books

1 The Hitchhiker's Guide to the Galaxy 1979 4.0 h 2 The Restaurant at the End of the Universe 1980 4.1 h 3 Life, the Universe and Everything 1982 3.9 h 4 So Long, and Thanks for All the Fish 1984 3.7 h 5 Mostly Harmless 1992 4.8 h

6 And Another Thing... 2009 length not known

Dirk Gently series

3 books

1 Dirk Gently's Holistic Detective Agency 1987 length not known

2 The Long Dark Tea-Time of the Soul 1988 5.2 h 3 The Salmon of Doubt 2002 5.5 h

Standalone books

The Meaning of Liff 1983 3.4 h The Original Hitchhiker Radio Scripts 1985 4.6 h Dirk Gently’s Holistic Detective Agency 1987 5.1 h Last Chance to See 1990 4.1 h The Deeper Meaning of Liff 1990 2.9 h The Ultimate Hitchhiker's Guide to the Galaxy 2012 14.8 h The Time Traveller's Almanac 2013 17.6 h

Collected editions

Volumes that gather several of the books above.

Novels (Hitch Hiker's Guide to the Galaxy / Restaurant at the End of the Universe / Life, the Universe and Everything / So Long, and Thanks for All the Fish / Mostly Harmless) 1979 15.0 h Novels (Hitch Hiker's Guide to the Galaxy / Restaurant at the End of the Universe / Life, the Universe and Everything / So Long, and Thanks for All the Fish) 1979 10.8 h Works (The Hitch Hiker's Guide to the Galaxy / The Restaurant at the End of the Universe / Life, the Universe and Everything / So Long, and Thanks for All the Fish / Young Zaphod Plays it Safe) 1986 11.4 h Novels (Dirk Gently's Holistic Detective Agency / Long Dark Tea-Time of the Soul) 1993 8.7 h Works (Hitch Hiker's Guide to the Galaxy / Restaurant at the End of the Universe / Life, the Universe and Everything / So Long, and Thanks for All the Fish / Mostly Harmless / Young Zaphod Plays it Safe) 1996 15.0 h