The Hitchhiker's Guide to the Galaxy is about Arthur and his friends trying to find out why Earth was destroyed. He is hitchhiking around the galaxy from ship to ship to find friends and to survive. He comes across a planet of legend that had originally made Earth to find the answer to the universe (which ironically, is the number 42). They must find why Earth was created and why the answer to the universe is 42.
This book was so gust-busting hilarous that I couldn't put the book down. A funny part was when they left the robot to gaurd the ship/computer, but when they came back... he had a funny story: I gave my opinion, and then it commited suicide. This book has a few innaproprette moments, but other than that, it's fine for anyone.