The more than complete hitchhiker's guide: the hitchhiker's ...
Douglas Adams
The long dark tea-time of the soul
Dirk Gently's Holistic Detective Agency
Mostly harmless
The Restaurant at the end of the universe
The hitchhiker's guide to the galaxy
The ultimate hitchhiker's guide to the galaxy
So Long, and Thanks for All the Fish
Life, the Universe and Everything
Life, the Universe, and Everything
HHGTTG - The Lost Chapters
The Ultimate Hitchhiker's Guide - All Six Books
1. The Hitch Hikers Guide to Galaxy