Chaco Canyon in northwestern New Mexico contains a remarkable set of Ancestral Puebloan buildings. Occupied between AD 850 and 1150, Chaco appears to have been the cultural and political center for much of what is now the Four Corners region. Many sites in the Chaco Culture National Historical Park have been continuously studied for more than a century. Vivian and Hilpert wrote this encyclopedic handbook to help organize the extensive amount of information available for Chaco, as well as to stimulate speculation and encourage further exploration. The result is a highly accessible but...