I need some recommendations for the *best* ap guide. I know princeton review is very popular, but some say is very simplistic and only covers basic materials. I also heard Barron's is pretty good at covering the material in depth. I really don't know much about McGraw Hill's 5 steps to a 5. I ap exams I am planing to take are AP Physics B, AP Calculus BC, and AP US History. (I may also register for AP Comp Sci A, depending on my schedule after new year's eve) Thanks and I really appreciate your help!!