Your Body's Many Cries for Water
Dr. Fereydoon Batmanghelidj

As a result of extensive research into the role of water in the body, the author, a medical doctor, believes that he has found chronic dehydration to be the cause of many conditions including asthma, allergies, arthritis, angina, migraine headaches, hypertension, raised cholesterol ....  A dry mouth is not a reliable indicator of your body's water needs.  He describes a variety of more reliable ones, and helps you learn to understand when your body is calling for water.