Book excerpt: "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, Elana and Christopher, who are spending the summer with their aunt Rosa, a park ranger...This charming tale is sprinkled with helpful tidbits about the park, weird-but-true facts about the animals, and more fun facts kids adore. A comprehensive afterword offers a short history of the park and ways kids can get involved in parks preservation"--