When I started researching the book that became 740 Park, I began with a list of fascinating buildings, and eventually settled on one. But the others retain their fascination and thanks to Avenue, which gave me a column in the spring named after my current book, Unreal Estate, I now get to write about them, too. My September column (read it here) peeks past the doorman at 834 Fifth, home of Rupert Murdoch, A. Alfred and Judy Taubman and Carroll Petrie, among many others.