This book is like a great family car trip through Yellowstone and the Tetons. And Butler, at the helm, is the ultimate tourguide/mom. Her descriptions of the area are so vivid you can almost hear her turning around to yell at you to stop all that fighting in the back seat... This book far surpassed my expectations for a driving guide, with excellent tidbits of information on the geography, geology and history of the area. If you are waivering on the idea of a trip to Yellowstone & the Tetons, this book is the convincer. If you're firm in your commitment to the trip, it is an invaluable guide.