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