It's worth having a look at some of the links in this post
http://www.pprune.org/7185789-post1907.html as well, especially if you don't have an aviation background.
I'll second what Hempy and Fujii said about the AIP, you'll use it a hell of a lot during the theory phase, but it's also knowledge you'll need when you get to the sim. The better you know it, the easier it'll be to recall it when you're under pressure. AIP GEN 3.4 is a good start.