Prevent and Defeat Cancer Naturally by Ron Harder, Nutritional Health Consultant. Did you ever wonder how a disease such as cancer gets started in your body? This book is a guide on how you can prevent cancer from developing. It describes how to remove the toxins within you that can cause you to become ill. The author explains medical concepts in layman’s terms so it is easy to read and understand. The goal of the book is to encourage you to take better care of yourself so that you can live a longer, happier life.