CARL is back! Volume 2 in a 4 part series. Come with this inquisitive chipmunk as he learns of a mystery at the Museum where he is a wildlife art guide for animals. Lynn Estes Friess, crafts another delightful story about Carl and one of his best friends. Willie Mouse. Noted artist, John Potter, brings the tale to life with bright, colorful illustrations. The stories about Carl and his friends are set inside the National Museum of Wildlife Art.