"According to Roy, underground or earth-sheltered' houses are unexpectedly livable. Judging by his book's attractive pictures, that's easy to believe. The house he bases his point-by-point guide on is indeed a showplace. Its homey touches are just that, though, and Roy's main concern is creating such a house, from drawing up the plans to surveying the site to the actual building. Roy's instruction is insightful and comprehensive....Throughout, he...