This is a great book for the novice to see the major muscles and how they work in the body or for the more advanced anatomist that would like a review/quick look at them. Information is not dumbed down though just gives you the basic facts and a little extra to help put things in perspective and give you a better big picture understanding. Like that the pictures are clear. I love that he has practical applications sections on each like "body language weakness" which explains how one would act or look if have a weakness in certain muscle and "watch out" which explains movements that can injure the muscle discussed. Plus the other interesting helpful blurs like he explains the origin of the name. Definitely recommend this book.
Other good A&P books: Trail Guide to the Body, Anatomy of Movement, Guide to the Human Body (by Richard Walker - is a pocket sized book with a page or two page spread on each system), clinical anatomy made ridiculously simple (some of the info in this is distorted because dumbed down but gets the big pictures across)
Blakey was an international ballet dancer and now a practicing osteopath: The Muscle Book presents a basic primer on muscles and how they work, from signs of problems to effective use of muscles. The book looks slim but the information packed herein is specific and easy to understand.