To build a house -- a livable, workable, practical house -- in inhospitable environments is among the most ambitious projects an architect can undertake. "Houses on the Edge" features 28 homes from around the world built on mountainsides, cliff faces, and other such spaces -- ll of which combine remarkable site control with cutting edge architecture to create truly spectacular examples of residential architecture with exquisite views, exceptional privacy, and incredible technical and artistic achievement. Truly, these are among the world's most inspiring houses.