Leaver, Dennis: - Dennis Leaver is a passionate writer, dedicated to exploring the intersection of God's endless love with human experience. Working primarily as an educator in the field of radiation oncology, he has helped cancer patients battle their disease. Leaver has authored five editions of Washington and Leaver's Principals and Practice of Radiation Therapy, which was recently translated into a simplified Chinese edition. He continues to write, helping patients and loved ones with the physical and emotional effects of cancer.