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