"Radio Shangri-La: What I Learned in Bhutan, the Happiest Kingdom on Earth" by Lisa Napoli (Crown, 304 pp.) What could be better than a glimpse of the happiest place on earth? Lisa Napoli, a former journalist who had wearied of her routine, jumped at a chance to move to Bhutan to volunteer at the country's first radio station for youth. Her memoir details her experience in the mountain kingdom. (February)