This is the story of a book called The Hitchhiker's Guide to the Galaxy; it is not an Earth book, has never been published on Earth, and, until the terrible catastrophe occurred, was never seen or even heard of by any Earthman. Nevertheless, a wholly remarkable book. Or, this is the story of The Hitchhiker's Guide to the Galaxy, a number-one best seller in England, a weekly radio series with millions of fanatic listeners, and soon to be a television...

In the fifth volume of the Hitchhiker series, Random, the daughter of Arthur Dent, leaves her remote home planet on the edge of the universe to set out a cross-galactic odyssey in search of her ancestors' native planet.