The Free On-line Dictionary of Computing (30 December 2018):

Silver Book

    Jensen and Wirth's infamous "Pascal User Manual
   and Report", so called because of the silver cover of the
   widely distributed Springer-Verlag second edition of 1978
   (ISBN 0-387-90144-2).

   See also book titles, Pascal.

   [Jargon File]

   (1996-12-03)