In this young adult novel, Joan Abelove, an anthropologist who spent two years among the people of the Peruvian Amazon, tells the fictional story of two anthropologists in Peru. The tale is narrated by a young woman of the fictitious Isabo tribe who's reluctant to like the American women, whom she finds stingy and obtuse. It's an unusual novel about cultural differences, geared for readers ages 12 and older.  (AMZ80, $5.99)