Jeff Wilson brings his twenty-five years of construction experience and knowledge of home building to bear on making our current houses cleaner, greener, and healthier. Think of a deep-energy retrofit (DER) as a home makeoverone that represents a significant investment, but that saves money from the get-go by capturing the energy you drop on the ground every month, every year, through inefficiency, poor design, or simply living in a typical older home. Using his own familys DER of their 1942 home as a prime example, Wilson weaves a readable narrative at a practical, hammer-and-nail level.