Book excerpt: Door County in Wisconsin is at the southern edge of an enormous forest that wraps around the top of the globe and helps protect the world. Rising temperatures and changing climate are threatening the peninsula's trees and wetlands, a haunting sign that this oxygen-producing boreal forest is retreating. What we see in Door County is as significant as the dwindling of glaciers-but much closer to home.Shoreline at the Edge examines Paul M. Lurie's aerial photographs of the county's vulnerable but resilient land along the Lake Michigan coast. His images should serve as an inspiring call to everyone that shares a bond to the land and water of Door County.