Douglas Adams was an English author, comic radio dramatist, and musician. He is best known as author of the Hitchhiker’s Guide to the Galaxy series. Hitchhiker’s began on radio, and developed into a “trilogy” of five books (which sold more than fifteen million copies during his lifetime) as well as a television series, a towel, a live theater show, a drink, a comic book series, a computer game and a feature film that was completed after Adams’ death. He was known to some fans as Bop Ad (after his illegible signature), or by his initials “DNA”.
So Long, and Thanks for All the Fish is the fourth book of the Hitchhiker’s Guide to the Galaxy “trilogy”. Its title is the message left by the dolphins when they departed Planet Earth just before it was demolished to make way for a hyperspace bypass, 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.”