David J. Linden author of The Compass of Pleasure..
b'On this edition of the Avid Reader, Sam talks with David J. Linden, professor of neuroscience at the Johns Hopkins University School of Medicine. He\'s the author of "The Compass of Pleasure: How Our Brains Make Fatty Foods, Orgasm, Exercise, Marijuana, Generosity, Vodka, Learning and Gambling Feel So Good."'