I owned the first edition of this book at one time, and I kicked myself for selling it when I finally joined a gym and started working out on a regular basis. This edition is an indispensable reference for planning your workouts. It is conveniently divided into seven parts, so it's possible to exercise almost every one of your muscles in a week. The drawings show you which exercises and angles work which muscles, variations of common lifts, and all muscles in each exercise are individually labeled.
The difference between the first and second editions is noticeable, but the update is not significant enough for me to recommend that owners of the first edition buy this second edition. The new features include some information on the differences between men's and women's bodies as well as differences among all people. For example, your friend might be able to lift a weight in a certain way, but the structures of your elbows force you to lift the weight in a modified form. Along with this acknowledgement of different body types and shapes comes more information on safety with regard to muscle and tendon tears.
If you need help with your weightlifting form, need tips for lifting weights safely, or you are simply interested in how the human body bears weight, this is a great book for you, indeed.