So Long, and Thanks for All the Fish

So Long, and Thanks for All the Fish (1984, ISBN 0-345-39183-7) is the fourth book of the Hitchhiker's Guide to the Galaxy series written by Douglas Adams. Its title is the message left by the dolphin when they departed Planet Earth just before it was demolished to make way for a hyperspatial express route, as described in The Hitchhiker's Guide to the Galaxy. The phrase has since been adopted by some science fiction fans as a humorous way to say "goodbye" and a song of the same name was featured in the 2005 film adaptation of The Hitchhiker's Guide to the Galaxy. The book begins with Arthur Dent, hitch-hiking randomly through the galaxy, arriving at (as the book's blurb describes it) "the last place in the Universe in which he would expect to find anything at all, but which 3,976,000,000 people will find oddly familiar" - namely Earth, which was demolished at the beginning of the first book in the series. After getting dropped off on the planet by a spaceship in the middle of a... full article at wikipedia