Lonely Planet: Yellowstone & Grand Teton National Parks (Book) by Bradley Mayhew and Andrew Dean Nystrom

From geysers to grizzlies, bison to bald eagles, this snappy guide introduces experts and tenderfeet alike to the wild and woolly wonders of both parks plus nearby areas and attractions. Has over 30 maps, including 1, 200 miles of trails; outdoor activities for all skill levels; family-friendly travel tips. 288 pages.