Gary D. Robson. Illustrations by Elijah Brady Clark. The first in the "Who Pooped" series of educational books offers humorous, child friendly explanations of animal scat and behavior and easy ways to tell different species of animals apart. Robson's tale spins around Michael, a young boy who learns to overcome his fear of grizzly bears as he and his family explore Yellowstone National Park and find, of course, animal poop! Come along with Michael, Emily and their family as they discover which animals made the poop (scat) and footprints (tracks) they find. You'll want to keep this book handy while you tour the park for the scientifically accurate track and scat notes. 2004. 48 pages. Softcover.