This book discussed about the effect of certain parasitic infection on the heart, leading to serious health problems. Many people believe that parasites only happen to someone else and that they do not have them. But it has been estimated that more than 50% of all people in the Western world will have some sort of parasitic or semi-parasitic animal living in their bodies. It is also thought that parasites could be a co-factor in almost every illness that we now suffer from. We have seen parasites cause psoriasis, heart problems, constipation, diarrhea, muscle weakness, floaters in the eyes, junk food cravings, excessive appetite, allergies and depression. Many people who complete a parasite program report that they are happier and enjoy the company of others more. "In recent medical studies it has been estimated that 85% of the North American adult population has at least one form of parasite living in their bodies. Some authorities feel this figure may be as high as 95%."