When he took Curious George to the zoo in the 1940s, the Man with the Yellow Hat he was a hero. But now the real heroes are the biologists who return monkeys to the forest. Since 1983, the National Zoo in Washington, D.C., has prepared captive-born tamarins, small Brazilian monkeys, for reintroduction to the wild. Ancona walks the reader through the zoo's program, teaching about the animal itself, the disastrous consequences of human's plundering of the rain forest, and the fascinating steps biologists must take to retrain the tamarins for survival in the wild. After a sheltered life in the zoo, the tamarins must learn how to prepare for the unexpected, forage for food (beginning with peeling their own bananas), and avoid predators. Although the text seems a bit scattered in focus, the photographs are outstanding, with plentiful shots of both the tamarins and the team of biologists at work. Many nature books sound the alarm about the depletion and extinction of the rain forest, but this title also shows the possibility of redemption through awareness and hard work.