Diet seems to be one of those places where there is a lot of variation between people. I believe it is because there is a large physiological component to food and eating. Having said that:

Good Calories,Bad Calories is a book that gets recommended around here quite a bit. I haven't read it myself. Sugar Busters is an interesting read, as it actually covers a bit of the science used in coming up with their program. Flaws in their method have been discussed ad nauseum, but the biology behind it seems sound.