Wizard Book

Hal Abelson, Gerald Sussman and Julie Sussman's "Structure and Interpretation of Computer Programs" (MIT Press, 1984; ISBN 0-262-01077-1), 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.