The Restaurant at the End of the Universe: Hitchhiker's Guide ...
Douglas Adams
The ultimate hitchhiker's guide to the galaxy
Mostly Harmless
Hitchhiker's Guide to the Galaxy (5)
Life, the Universe and Everything
Hitchhiker's Guide to the Galaxy (3)
So Long, and Thanks for All the Fish
The Hitchhiker's Guide to the Galaxy
The Long Dark Tea-Time of the Soul
Dirk Gently's Holistic Detective Agency