Douglas Adams's Starship Titanic: A Novel by Terry Jones

Starship Titanic is the greatest, most fabulous, most technologically advanced interstellar cruise line ever built. It is like a cross between the Queen Mary, the Chrysler Building, Tutankhamen’s tomb, and Venice. Furthermore, it cannot possibly go wrong…

Sadly, however, seconds after its launch it undergoes SMEF, or Spontaneous Massive Existence Failure. And disappears.

Except, everything’s got to be somewhere.

Coming home that night, on a little known planet called Earth, Dan and Lucy Gibson find something very large and very, very shiny sticking into their house…