I don't own many architecture books, but with the Phaidon Atlas of Contemporary World Architecture I don't think I'll need many more. Measuring 12"x18" and weighing in at 18lbs (comes with a clear plastic briefcase-style carrying case), and surveying architecture across the world (1052 buildings completed since 1998), it's absolutely gorgeous. I'm a complete nut when it comes to visiting modern architecture in cities and now I have a gigantic reference with which to plan my future trips.