The Ultimate Hitchhiker's Guide to the Galaxy
Dirk Gently's Holistic Detective Agency
The Restaurant at the End of the Universe
The Salmon of Doubt (Hitchhiker's Guide to the Galaxy)
The Long Dark Tea-Time of the Soul
So Long, and Thanks for All the Fish (Hitchhiker's Guide to the Galaxy)
The Bitter Man's Guide to Women
Life, the Universe and Everything (Hitchhiker's Guide to the Galaxy)
The Hitchhiker Trilogy (5 Books)
Mostly Harmless (Hitchhiker's Guide to the Galaxy)