Dirk Gently's Holistic Detective Agency
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Dirk Gently (1)
Long Dark Tea-Time of the Soul
Dirk Gently (2)
The Illustrated Hitchhiker's Guide to the Galaxy
The Hitchhiker's Guide to the Galaxy (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
The Hitchhiker's Guide to the Galaxy (4)
Mostly Harmless
The Hitchhiker's Guide to the Galaxy (5)
Life, the Universe and Everything
The Hitchhiker's Guide to the Galaxy (3)