I brought this book and it's terrible. I took the 2001 AP and I am 100% sure I got a 5, even though I didn't get the results yet. I just know bio cold. I could have written a much better book than this (now there's an idea...) The authors talk about topics that are not important at all and do a 7th grade level review of the important topics. I would go with the Cliff's book or Barron's College Review Series in Biology if you want a review book. The best advise I can give is to read the textbook, and DO NOT waste any money on this book. This book is very poorly written.