If you are searching for a review book or the AP Biology exam, look no further.. you need to buy this book right now!I recently took the Biology exam and this book has helped me learn material I was not taught in class, or review material I had forgotten. What I like about this book is that every section was not overcrowded with information. All the chapters were short (6-40 pages about) and to the point. All of the topics were explained perfectly that I was never confused about what I was reading. The book comes with useful sample questions at the end of each section so you can test yourself, and the questions and explanations are very helpful. I actually saw one question from the review book on my AP Exam, so you know their information is reliable.The one thing I did not like about this book was the lack of figures, or graphics. I am a visual learner and I would have preferred more descriptive pictures, such as the ones in my actual AP BIO textbook, to better understand concepts. The figures they had were vague. Anyway, they did a great job at enlightening me about plants, a subject I did not learn in class but was prevalent on the exam. Please choose this book for its benefits are enormous and you are guaranteed a 4 or a 5 if you read this book in depth.