The 531 is a relatively simple to follow and there is quite a few articles by Jim Wendler on T nation. They give a pretty good overview of the program(s).
I personally don’t feel his books are written too well and contain too many programs. He probably could do with an editor. For example one of my books doesn’t have an index and contains page upon page of different programs.
But in general the basic setup comprises of 4 weeks with three weeks of progressive weight increase and a deload week. The deload week can be skipped sometimes.
This is a really good article on the website and explains the principles very thoroughly.
Essentially beyond this ‘base’ template there is a diverse range of workout supplementation based on your needs.
I personally would advise buying his beyond 531 book - as I’ve found it to be the most useful.