There are light-hearted parts and cartoon illustrations, also. My best review was from a fellow who quit smoking after reading it. And many physicians are recommending it to their patients. It's guaranteed to help people understand the habit, even non-smokers. Not everybody is ready to quit right away.
Accurate information can help somebody make that decision, though.
I've never met anybody who regretted buying this book, or quitting smoking. Dr. Simon T. Bryant is a Family Physician, a Clinical Lecturer at the University of Calgary Medical School, and is on the Board of Directors of Physicians For a Smoke-Free Canada. He is an enthusiastic teacher and is much in demand for his helpful presentations on smoking, both to his medical colleagues and the public.