Tangled RootsThe Appalachian Trail, a thin ribbon of wilderness running through the densely populated eastern United States, offers a refuge from modern society and a place apart from human ideas and institutions. But as environmental historianand thru hikerSarah Mittlefehldt argues, the trail is also a conduit for community engagement and a model for public private cooperation and environmental stewardship. In Tangled Roots, Mittlefehldt tells the story of the