So long, and thanks for all the fish
Douglas Adams
The Hitchhiker's Guide to the Galaxy (4)
The Restaurant at the End of the Universe
Mostly Harmless
The Hitchhiker's Guide to the Galaxy (5)
The Hitchhiker's Guide to the Galaxy: Life, the Universe and ...
The Hitchhiker's Guide to the Galaxy (1)
The Hitchhiker's Guide to the Galaxy
Douglas Adams & Eoin Colfer