Everything you need to understand or teach Life, the Universe and Everything by Douglas Adams.
"Life, the Universe, and Everything" is a humorous science fiction novel that tells the story of the accidental space traveler Arthur Dent, an Englishman who escapes the destruction of the Earth and ultimately saves the universe from complete destruction. The book is the third in the series of "Hitchhiker's Guide to the Galaxy" books.
As the book opens, Arthur Dent is living in a cave on prehistoric Earth having been sent back in time at the end of the previous book in the series. He lives alone and is almost crazy when his former traveling companion, Ford Prefect, who has been living on another part of the planet, appears suddenly. The two of them are whisked through time and space to a future Earth, where they suddenly materialize on a velvet paisley couch in the middle of a cricket match in England just days before the Earth is to be... View more of the Life, the Universe and Everything Summary