I have the two books currently sitting next to me. They're very very in-depth and math focused (well that's sort of expected for the mathematics book at least)

I have the two books currently sitting next to me. They're very very in-depth and math focused (well that's sort of expected for the mathematics book at least) - you might want to also look at some more lightweight and "fun" tutorials for rendering and going in-depth with the rendering book in parallel.