The Driftless Land, a collection of essays by Kevin Koch, is a search for the spirit of place among the bluffs, woodlands, and prairies of the Upper Mississippi River valley. The Midwest is commonly known for its flatlands, for oceans of corn pressing towards the horizon beneath a big sky. Lesser known are the steep hills and bluffs, the ravines and towering rock outcroppings where the upper Mississippi carves its meandering path. These rugged lands...