Dr. Merlin Tuttle and his colleagues at Bat Conservation International aren't scared of bats. These bat crusaders are fascinated by them, with good reason. Bats fly the night skies in nearly every part of the world, but they are the least studied of all mammals. As the major predator of night-flying insects, bats eat many pests. Unfortunately bats are facing many problems, including a terrifying new disease. White-nose Syndrome is infecting and killing millions of hibernating bats in North America. But Dr. Tuttle, with the help of his fellow bat scientists are in the trenches—and caves—on the front line of the fight to save their beloved bats.