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

Pink-Shirt Book

    "The Peter Norton Programmer's Guide to the IBM
   PC".

   The original cover featured a picture of Peter Norton with a
   silly smirk on his face, wearing a pink shirt.  Perhaps in
   recognition of this usage, the current edition has a different
   picture of Norton wearing a pink shirt.

   See also book titles.

   [Jargon File]

   (1995-03-28)