Dirk Gently's Holistic Detective Agency (Dirk Gently Series)
Douglas Adams
Mostly Harmless
The Long Dark Tea-Time of the Soul
HHGTTG - The Lost Chapters
The Restaurant at the End of the Universe
Life, the Universe and Everything
So Long, and Thanks for All the Fish
The Hitchhiker's Guide to the Galaxy
Douglas Adams & Eoin Colfer
Life, the Universe, and Everything
The Hitchhikers Guide to Galaxy
The Ultimate Hitchhiker's Guide to the Galaxy
Douglas Adams & Neil Gaiman