Don't Panic: collected together in the Hitchhiker's Guide Trilogy are the five titles that comprise Douglas Adams' wildly popular and wholly remarkable comedy science fiction series, with a special introduction from the author. The Hitchhiker's Guide to the Galaxy One Thursday lunchtime the Earth gets unexpectedly demolished to make way for a new hyperspace bypass. For Arthur Dent, who has only just had his house demolished that morning, this seems already to be rather a lot