I honestly do not know how many Wright books I have(40-50?). There are better photos of one house like Fallingwater in specific books devoted to one house, but that being said, this is the best book of photos of Wright Houses, particularly Usonian houses that I have ever seen. It is simply stunning. Even the site photographs are magnificent. When you compare the houses that have been moved from their original site(Pope-Leighy, Gordon)to those that have not it makes the genius of Wright even more amazing.
If you are a fan of Frank Lloyd Wright, do not miss this!!