This page will be a valuable resource telling people everything they need to know about PostScript, novice or expert. One day.
For now, I have pillaged some useful links to conceal the fact that I haven't written much yet.
At the quite site
It is hard to find out much about PostScript errors, so we've written something. It is aimed mostly at the non-programmer trying to print a file and getting PostScript errors. It includes details on what each PostScript error is likely to mean in a 'real world' problem.
Thinking in PostScript
Thinking in PostScript is an important book about programming in PostScript. Now out of print, the author has made it available on http://www.rightbrain.com/ - just click on the Books link. The book is in Acrobat PDF format, and covers beginner to intermediate PostScript programming experience.
Other resources on the web
A useful work in progress than may also save me a good deal of trouble is A First Guide To PostScript.
The PostScript FAQ (Frequently Asked Questions) is full of answers, anda very comprehensive book list. At the end of this link is an FTP directory with the FAQ in a variety of formats and arrangements.
Go to Quite At Home.