"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.
