"In the cloud forests of the Amazon Basin, scientists are installing extraordinary numbers of camera traps in the hopes of learning more about an elusive species - woolly monkeys. No one knows for sure how many woolly monkeys are left in the wild. But they play a key role in their ecosystem, and without them the rain forest is in trouble.Join scientists on their quest to solve the mysteries surrounding the lives of woolly monkeys before it's too late." -- page 4 of cover.