Review on the book "Your Body: The Missing Manual"
Your Body: The Missing Manual by Matthew MacDonald, published by Pogue Press in Aug 2009.
Before reading any textbooks on human anatomy or physiology, you may want to read this introductory book to get a rough idea about your body. It is written in easy-to-read format and probably after reading this book, you will be interested in exploring books that provide in-depth information. Even if you are not inclined to do so, probably at least you will get the enforcement that good diet and regular exercise contributes to your health.
No matter what your choice is, it is better that you avoid using flat files to store your data: They may be easier to code in the beginning, but they will cause a lot more issues in the future.