Dr. Merlin Tuttle is fascinated by bats, with good reason. Bats fly the night skies the world over, but are the least studied of all mammals. As the major predator of night-flying insects, bats eat many pests. But bats are facing many problems, including a scary new disease. White-nose syndrome is killing millions of bats in North America. Dr. Tuttle and his fellow bat scientists are on the front line of the fight to save their beloved bats. This edition features updates with the most recent information about WNS. Paperback, 80 pages. By Mary Cay Carson, Photographs by Tom Uhlman.