So I voted Ridiculously Simple but I really should have put both. (didn't read carefully enough, I used both)
I hate to say it but you really do need to listen to/read the lectures if you want to do well. Unless you have a school very different from others they are going to grab some obscure stuff that isn't actually important form the powerpoints and test on it. (they don't do this so much on the shelf, I felt the shelf was pretty fair)