This was an interesting book. According to lead author Baumeister, an academic psychologist, willpower has gotten a bad name since Victorian times. But he builds a convincing case that willpower is something like a muscle that needs go be fed (with glucose) and rested. With many examples from the world of psychological research, including the famous marshmallow test, and with examples ranging from Eric Clapton to David Blaine, and a particularly interesting chapter about Henry Morton Stanley. Recommended.