The Restaurant at the End of the Universe is the second book in the Hitchhiker's Guide to the Galaxy comedy science fiction "trilogy" by Douglas Adams, and is a sequel. It was originally published by Pan Books as a paperback in 1980. The book was inspired by the song "Grand Hotel" by British rock band Procol Harum. The book title refers to Milliways, the Restaurant at the End of the Universe, one of the settings of the book. Elements of it are adapted from the radio series, primarily the Secondary Phase, although Milliways itself, Arthur and Ford's final fate come from Fits the Fifth and Sixth of the Primary Phase.

Zaphod Beeblebrox is a fictional character in the various versions of the comic science fiction series The Hitchhiker's Guide to the Galaxy by Douglas Adams.