I only believe in self improvement books if the author practices what he or she preaches and has success to show for it. I wouldn't take diet advice from a fat man. That is why I thoroughly enjoyed "Mastering Fasting" - the author describing his journey makes the book relatable, trustworthy and inspiring. Also I really loved the style of writing - it was simple, easy to follow and engaging, like having a conversation with a friend.
"Mastering Fasting" is such an inspiring read for anyone who wants to enhance his or her quality of life. It offers simple methods which don't require tons of effort, but they go a long way in improving health and wellbeing. I love how the author explains the theory behind the benefits of fasting/time restricted eating. Sometimes was a bit too technical for me, but this is because I've no in-depth knowledge of the subject, and I think it is a great starting point for further research.
Personally I've never seriously considered fasting, thinking it was a practice for health nuts and monks, but after reading this book I'm already one week in.