Scout Moore, Junior Ranger: Yellowstone

From the publisher: In the next book in the award-winning Scout Moore series, the ever-adventurous junior ranger ("I am ranger of my own backyard!") travels with her family to Yellowstone National Park, where they visit thermal features, watch wildlife, and gaze in wonder at the Grand Canyon of the Yellowstone. Along the way her younger brother Wesley insists they will find a dragon in the park, and he's partially proven right when they come across Dragon Spring. Their guide, Ranger Bob, is ever helpful in helping Scout Moore and her family discover the wonders of our first national park.