Up until the latter part of the twentieth century, most people thought that your brain was fixed. What you got is what you had and you will slowly lose what you have as you grow older. The good news is that they were wrong. Even better news, this book can show you what to do to keep you at your mental best. The old adage, "Use it or lose it" is true concerning the brain. This book will show you how to use it, so you don't lose it.