If you have confusing and unexplained breathing problems or your asthma has not responded to treatment, this book is for you. The Chronic Cough Enigma is written for people who have been coughing for months or years and cannot get useful answers from their doctors. If you have confusing and unexplained breathing problems or your asthma has not responded to treatment, this book is for you. The Chronic Cough Enigma is written for people who have been coughing for months or years and cannot get useful answers from their doctors.