Can't go wrong looking to Shulman and Stoller. Working today? http://www.normanmcgrath.com/ is still active, I believe. He has a couple of how-to books that provide a good foundation for those who have the basics of photography mastered and want specialized knowledge about architectural photography.

The New York Times lens blog featured him in 2011 here: http://lens.blogs.nytimes.com/2011/0...ype=blogs&_r=0

And along the Ezra Stoller line, I'm no expert, but would guess any of the folks associated with his Esto would be industry leaders today:

http://www.esto.com/photographers/