The Hitchhiker's Trilogy, Omnibus Edition Omnibus ed., 1st ed edition

The increasingly more inaccurate trilogy of the Hitchhiker's Guide to the Galaxy, the book that tells you the most useful thing in the universe - a towel - gives you the Answer to Life, the Universe and Everything, introduces you to Arthur Dent and then destroys Earth, his home planet, and proves that no matter how bad things seem, you can always round it off with breakfast at Milliways.

Very well worth reading, very fictional and exceptionally funny.