This book is all about pleasure. We’re living in a period of unparalleled availability to high-reward, high-dopamine stimuli: drugs, food, news, gambling, shopping, gaming, texting, sexting, Facebooking, Instagramming, YouTubing, tweeting… The increasing numbers, diversity, and potency is astonishing. Our smartphone is the contemporary hypodermic needle, giving digitized dopamine 24/7 for a networked generation. As such…