Mosque by David Macaulay. Houghton Mifflin, 2003.

The intro is sort of dry, but the melding of fiction and nonfiction with fascinating detail on construction held my interest to the end. Yet why was there such a need for bathing? (I know it’s ritual bathing, but the text doesn’t tell me this.) There’s a ton of info on engineering, but not much on culture. The how is thorough; the why is underdeveloped.