This affordable 94 page book can be your lifesaver and is one of the most important swimming skills you can learn. It is a prelude to learning to swim breaststroke, and is more like swimming breaststroke on your back even though it is called elementary backstroke.If you ever get tired in open water but still need to make some progress to safety this is the best stroke to learn and do. The book explains how to do sculling to keep afloat so you can see what your kick is doing when you teach yourself the three sub routines you will chain together in an efficient breaststroke kick. Next, you will learn how to sweep both arms timed with your kicking motion to get a long relaxing glide.It is a must skill to learn at any age, and fun to swim as you get more distance per stroke than any other swimming stroke. You can easily go the height of your body in each complete swimming stroke. That is being highly efficient