by Hulda Regehr Clark presents the controversial claim that all cancers can be cured through natural methods, specifically by addressing the root causes that Clark believes are behind the disease. According to Clark, cancer is caused by a combination of parasites, toxins, and pollutants in the body. She advocates for the use of herbal remedies, a special diet, and a device she invented called the "Zapper" to eliminate parasites and restore health. The book outlines various protocols for detoxifying the body, avoiding harmful substances, and using her Zapper device to kill parasites. Clark's approach is holistic, emphasizing the importance of a clean environment and natural healing methods.