America’s national parks are sanctuaries in a world in which such spaces are steadily disappearing, with more than 300 million people visiting the parks annually. Terry Tempest Williams, author of environmental classic Refuge and the beloved memoir When Women Were Birds, returns with The Hour of Land, a literary celebration of our national parks, an exploration of what they mean to us and what we mean to them. One bumped corner on back at bottom of spine. See photo.