My parents recommended this book even though they have sadly become smokers again. I had a very traumatic few months at the end of 2024 and went from  barely smoking to smoking a pack a day very quickly. This book has helped put into perspective what I was doing, it was a crutch but ultimately was making me more stressed than if I had never smoked at all. Great book; a little outdated now but the main concepts are right on the money.