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Related stories

A short story by Adams, " Young Zaphod Plays It Safe ", first appeared in 1986, in The Utterly Utterly Merry Comic Relief Christmas Book, a special large-print compilation of different stories and pictures that raised money for the then-new Comic Relief charity in the UK. The story also appears in some of the omnibus editions of the trilogy, and in The Salmon of Doubt. There are two versions of this story, one of which is slightly more explicit in its political commentary.

A novel, Douglas Adams' Starship Titanic: A Novel, written by Terry Jones, is based on Adams's computer game of the same name, Douglas Adams's Starship Titanic, which in turn is based on an idea from Life, the Universe and Everything. The idea concerns a luxury passenger starship that suffers "sudden and gratuitous total existence failure" on its maiden voyage.

Wowbagger the Infinitely Prolonged, a character from Life, the Universe and Everything, also appears in a short story by Adams titled "The Private Life of Genghis Khan " which appears in some early editions of The Salmon of Doubt.