3/17/08. In the April 3, 2008 New York Review of Books, Sue M. Halpern reviews 5 new books on happiness. Since Martin Seligman, Ph.D. launched "Positive Psychology" in 1998, the number of investigations about character, virtue, and positive emotions have skyrocketed. Happiness, one might say, is a serious topic. Psychology now is developing a manual of the sanities --- looking not just at the origins of psychopathology, but at the origins of a psychologically healthy life.