My Psychologist suggested I read this book. I was going through a divorce that was not by my choice and feeling trapped, manipulated and depressed. Honestly, I didn't finish reading the whole book. It was too technical for me to stay interested through the last chapters. The several chapters I did read convinced me that I was not trapped by my circumstances and unlike the tested subjects, I was not helpless. It revolutionized my attitide and helped turn my depression around. I have subsequently, bought two other books by the author, "Authentic Happiness" and "Learned Optimism" and give them two enthusiastic thumbs up! Life changing!