ROD TIMANUS. Montezuma Castle National Monument. Arcadia Publishing. 128 pages; softcover, $21.99; arcadiapublishing.com

Originally thought to have been built by the ancient Aztecs, later research proved it to be the handiwork of a long vanished people named the Sinagua. They inhabited the site for over three centuries and then simply walked away to be lost in the mists of time. The author traces the history of Montezuma Castle through its construction, abandonment, later discovery, and the diligent efforts of many individuals and organizations to restore and preserve it.