America from the Air: A Guide to the Landscape Along Your Route
Daniel Mathews and James S. Jackson

A site and region-based book. Despite digression into the geology of landforms, there are many interesting human landscapes discussed, using numbered annotations on contrast-boosted images taken out the window of jetliners, or vertical satellite imagery (which is less useful in this context, somehow). The book is arranged according to the general preferred routes planes take between major cities. A CD-ROM is also included, so you can read it on your laptop from the plane.

Houghton Mifflin, 2007, paperback, 386 pages, many color photographs.