🚀 go-pugleaf

I confess, I'm new to the PostScript world.  I've been reading this
newsgroup for a few weeks, trying things that come up, doing my best
to follow what people are doing.  So far, it's been okay, but I've
got a couple of questions -- 

People refer to the "red" book, and the "blue" book, and even the
"green" book.  Do they have titles other than that?  Are there other
colours of books?  Who are they by? Are they available at better
bookstores, or do I have to mail away for them?  Does somebody have
the publisher's name(s) and the books' ISBNs or stock numbers or
something, so that I can get these books and immediately start
mystifying the neophytes? 

I suspect that the answers needn't be posted.  If some kind soul could 
mail me the information I seek, I'd sure appreciate it.