This book is basically amazing! It is written by a man who's gotten a perfect score on the ACT over six times and he takes the test every time it is administered so that he can learn more about it each time. If you are a student who waits until literally the week before to start studying for the ACT, I HIGHLY recommend this book. It provides helpful tips (e.g. the fact that the answer "its'" should never be chosen because it is grammatically impossible) that help you master the ACT! Also, it is spot-on about what you should do to get through the test without running out of time.