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