Trail of the lost : the relentless search to bring home the missing hikers of the Pacific Crest Trail

"As a park ranger on the National Park Service's law enforcement team, Andrea Lankford led search and rescue missions in some of the most beautiful (and dangerous) landscapes in America, from Yosemite and Zion to the Grand Canyon. But though she had the official support of the agency, Andrea found herself increasingly frustrated with the service's bureaucratic idiosyncrasies, and after twelve years, she finally left the force, haunted by her own...