So Long, and Thanks for All the Fish
Douglas Adams
The Hitchhiker's Guide (4)
The Salmon of Doubt
Dirk Gently (3)
The Restaurant at the End of the Universe
The Hitchhiker's Guide (2)
Mostly Harmless
The Hitchhiker's Guide (5)
The Long Dark Tea-Time of the Soul
Dirk Gently (2)
Life, the Universe and Everything
The Hitchhiker's Guide (3)
The Hitchhiker's Guide to the Galaxy
The Hitchhiker's Guide (1)
Dirk Gently's Holistic Detective Agency
Dirk Gently (1)