The author begins his book by discussing the different ways the word "Balance" is used. It's not really relevant to the theme of the book which is the balance issues that your body might have. Nevertheless, when the main theme is begun, the author gives detailed descriptions of the inner ear, the brain, and many other places in the body that affect your balance. This is undoubtedly helpful to audiologists, physicians, and others that work with balance-challenged individuals, but for the lay person (balanced challenged though I may be) it's a bit repetitious in its descriptions and I found myself skimming many details. The charts are simple and helpful, and I did learn some useful things that I will pursue in preventing any falls in the future..