We used Potter and Perry as well. One book that I like is the Saunders Comprehensive NCLEX Review. It is required in the upper level nursing classes at my school. It does have some sections on fundamentals, and the review questions at the end of each section are excellent. They were a lot like our test questions, so we could use them after we studied, to see where we were at, study wise.
The hard thing about nursing tests is that they are unlike any test you have ever taken, you almost have to retrain your brain. One of my first teachers told us, and it was good advice, if it is a multiple choice question, cover up the answer and try to answer the question based on what you KNOW that you know, before you look at the choices and confuse yourself. Also, don't change your answer unless ou are 110% sure that you were wrong. I've had a few teachers that have threatened to cut the erasers off of our pencils, because your brain usually goes for the correct answer first.
To the poster that has heard about the Made incredibly easy books, I prefer the Lippencott reveiw series instead. They are made by the same people, but the incredibly easy books seem to be too simple, and don't prepare you for the test as well as the other.
Best of Luck,