American Medical Association Family Medical Guide, 4th Edition Invaluable. The book I use to make sense of Western Medicine at a level I can understand.
The Pill Book (12th Edition) Know your Meds. If your not a MD and you want a clue what a Western Med does including side-affects....here it is.
The Human Body Book (Book & DVD) Masterpiece. By visuals and simple, not dumbed down explanations, you will understand how the body works.