This book is in the middle of my mind because it covers the basics you need to do well on the actual exam. I found the practice problems to be helpful but there are some errors to the answers. As a AP Chemistry student, I don't recommend this book if you are expecting to learn the math because it has no examples to math problems. It gives you basic definitions of all the concepts but has no math examples that the book expects you to know how to solve. Overall the problems are very helpful, but it needs more information to each chapter. Some chapters are really short and the book test you in the next two pages or so.