Peeping tomism plays a pivotal role in the elegant world of Murasaki Shikibu's "The Tale of Genji," Doris Bargen argues in her new book, "Mapping Courtship and Kinship in Classical Japanese." This may surprise readers as much as the argument in her 1997 monograph, "A Woman's Weapon." In that erudite book, she refuted the traditional understanding of mononoke ("spirit possession") in Shikibu's grand romance. Mononoke is the spirit central to such haunting noh plays as "Aoi no Ue."