Dirk Gently's Holistic Detective Agency
Douglas Adams
Life, the Universe and Everything
The Long Dark Tea-Time Of The Soul
The Hitchhiker’s Guide to the Galaxy
The Ultimate Hitchhiker's Guide to the Galaxy (1)
The Restaurant at the End of the Universe
The Ultimate Hitchhiker's Guide to the Galaxy (2)
So Long, And Thanks For All The Fish
The Ultimate Hitchhiker's Guide to the Galaxy (4)
Mostly Harmless
The Ultimate Hitchhiker's Guide to the Galaxy (5)
HHGTTG - The Lost Chapters
Last chance to see
Douglas Adams & Mark Carwardine
The Salmon of Doubt
Young Zaphod Plays It Safe
The Meaning of Liff
Douglas Adams & John Lloyd