Useful books on Postscript

• Postscript Language Reference Manual documents the entire language
• Learn Postscript by Doing by A. Heck
• Mathematical Illustrations by Bill Casselman

Simple Postscript

• PostscriptPainting1
• PostscriptLanguage1
• PostscriptStackOperations1
• PostscriptMathematicalOperations1

Online Resources

http://www.linuxfocus.org/English/July1999/article80.html

Older stuff

BasicPostscript1 OldThoughtsOnGhostscriptEtc