Buddy Bison's Yellowstone AdventureBy: Ilona E. Holland Butterflies flutter, birds soar, and geysers burst into the sky. Join Buddy Bison and his two new friends as they explore the majestic Yellowstone National Park. Breathtaking photographs of Yellowstone serve as the backdrop for the wacky adventures of a curious pair of twins, Elena and Christopher, who are spending the summer with their aunt Rosa, a park ranger. Instead of waiting patiently when their aunt gets an emergency call,