Amazon.com description: Product Description: This book is a great help. Any class (Either AP or Regular Biology) taught out of Campbell's Biology is going to be tough. This book breaks down long, often tedious chapters into straight foward sections. Also there are many practice questions at the end of each mini-chapter and the answers are in the back. (This is good for your grade, 'cause teachers often give you worksheets with these same questions on them! Hahaha) The only problem is that sometimes the chapters are too abridged and you miss out on something important, so I still recommend reading the real chapters---but if your in a pickle and their is only 15 minutes until class, just read the study book. Enjoy!