This is a good book for beginning and intermediate cachers to learn the basics. It also covers your first trips out to the wilderness and how to do so safely, and if you're interested in learning how to read and plot on Topographic Maps, there is a detailed chapter covering navigation.
The only issue with this book, is that it is dated as far as the technology goes.
Not a bad book really, unfortunately it's just really outdated now! Geocaching has changed drastically since this book has been printed in technology, ethics, physicality, etc... There are some good resources and links toward the bank, not all of them work anymore though.