Wizard Book: n. "Structure and Interpretation of Computer
Programs" (Hal Abelson, Jerry Sussman and Julie Sussman; MIT Press,
1984, 1996; ISBN 0-262-01153-0), an excellent computer science text
used in introductory courses at MIT. So called because of the
wizard on the jacket. One of the bibles of the LISP/Scheme world.
Also, less commonly, known as the Purple Book.