This book is a great book for beginners. I am trying to learn about Earth Science and this book is great! I like that I can quiz myself and, in needed, review what I need to work on. The best part of all: I can learn at my own pace! The only thing is there is is misprint in this book. It says that Mount St. Helens in in Oregon. Nope. It's in Washington State! OOPS! But none-the-less, a great book! I have also read other books in this series. Alternitave Energy, Enviromental Science, & Meterology. All are excellent! Great for self-study!