Underground housing is a concept whose time has come again. Its advantages over above-ground housing are spectacular. It stays warm in the winter and cool in the summer. It blends in with nature rather than rearing above it. It can double the yard space in a city. To the neighbors it looks like a park. It is the most environmentally sound. It uses half the building materials. It is the safest form of housing: it is fire resistant, radiation resistant and is impervious to tornado and hurricane strength winds. It even does better in earthquakes. Clever use of mirrors provides ample lighting in every room. This reference leads you to several books and videos. Contact info. $12.95 (Order# 5212)