Chimney Rock in the Four Corners area of the U.S. Southwest may have functioned as an ancestral Puebloan version of the Greenwich Observatory, claims Malville (emeritus, astrophysical and planetary sciences, U. of Colorado). This update of the 1993 edition incorporates new understanding of the astronomy, in cultural context, practiced by the Puebloans between 700 and 1300 CE. Site maps, calendars, and photos of structures at Chaco Canyon and elsewhere guide visitors to observe the same phenomena as the ancients. Annotation ©2008 Book News, Inc., Portland, OR (booknews.com)