With the iconic Philip Johnson home opening to visitors on June 21, Christopher Mason goes “Behind the Glass Wall.” Besides the standard it’s spare! it’s glass! revelry, Mason (with additional reporting but no critique by Philip Nobel) manages to find a cool new hook by interviewing friends of residents Johnson and David Whitney who visited, worked on or wrote about the house during its 58-year history. There are big names in there with some funny things to say–“Incidentally, New Canaanites hated Philip Johnson”–and it’s a final, fitting tribute to the end of the private era. The Glass House, once mysterious, is now completely transparent.