Mostly harmless
Douglas Adams
The Hitchhiker's Guide to the Galaxy (5)
Life, the Universe and Everything
So Long, and Thanks for All the Fish
The Restaurant at the end of the universe
The Hitchhiker's Guide to the Galaxy (2)
Dirk Gently's Holistic Detective Agency
Dirk Gently (1)
The long dark tea-time of the soul
Dirk Gently (2)
The hitchhiker's guide to the galaxy
The Hitchhiker's Guide to the Galaxy (1)