The LEGO Architect
This just arrived in the mail today, with an unexpected engraved brick as a bonus!
I had the pleasure of hanging out with Tom earlier in the year along with the opportunity to contribute an image to his absolutely wonderful book. It's beautifully designed and thoroughly researched, with fantastic real world and LEGO examples of various architectural styles, plus diagrams that really get at the essence of each. I can't recommend it highly enough, and I promise I don't get any cut of the profits to say so.