For decades archaeologists insisted that southwestern cultures such as the Anasazi, Hohokam, and Mogollon had little or no relation to peoples south of the "border"' Now American archaeology is beginning to take seriously the notion that goods, gods, and even humans may have passed with some frequency between the high cultures of Mexico and the Southwest.

In his latest book, Carroll Riley presents an ambitious overview of the continuities he sees in the geographically vast and culturally complex American Southwest and the adjacent northwest of Mexico. Aided by extensive illustrations, he argues that although the Southwest remained "southwestern" in its basic economy, there were drastic changes beginning around A.D. 1200 that transformed socio-religious life throughout the region. Riley calls this period Aztlan, a name adopted from the mythic Aztec land of origin. A Pueblo Indian in A.D. 800 would have gathered and farmed the same foods as his descendants, but by 1400 those distant relatives had a very different concept of the physical and spiritual universe.

In addition to bringing vast erudition and jargon-free prose to bear on a complex subject, Riley’s conclusions have potentially sweeping implications for the future of archaeological studies in the greater Southwest.

The Casas Grandes World focuses on a remarkable prehistoric culture that extended through parts of present-day Chihuahua, Sonora, New Mexico, Texas, and Arizona, centering on the large Mexican site of Casas Grandes. The thousands of prehistoric sites in this vast area have only recently been considered related to each other, yet it now appears that for more than 200 years, from about AD 1200 to 1425, the people of the region traded with each other, made coursed-adobe pueblos in the desert country, manufactured magnificent pottery, and produced some of the most extraordinary rock art in North America. Casas Grandes was recently designated a World Heritage Site by the United Nations.

During is florescence Casas Grandes served as a conduit or nexus between the Anasazi of the ancient American Southwest and the Mexican civilizations to the south. Using the seminal work of Charles Di Peso as a touchstone, and drawing on significant new archaeological work, this volume offers a reevaluation of the extent, history, and meaning of the great site and its far-reaching connections. It also considers influences on the Hohokam of Arizona and the peoples of west Mexico, positing the existence of a vast sphere of Casas Grandes cultural influence.

In The Kachina and the Cross, Carroll Riley weaves elements of archaeology, anthropology, and history to tell a dramatic story of conflict between the Pueblo Indians and Franciscan missionaries in the seventeenth-century Spanish colony of New Mexico.

Until now, histories of the early Southwest have tended to concentrate on the Spanish presence, with little mention of Indian resistance or the decade-long war that eventually erupted. In The Kachina and the Cross Riley completes the picture by utilizing archaeological and anthropological research from the past forty years, fleshing out the story of the first century of sustained Spanish-Pueblo relations.

Rio del Norte chronicles the upper Rio Grande region and its divers peoples across twelve thousand years of continuous history. Based on the most up-to-date historical and archaeological research, Rio del Norte is a tour de force, highlighting the unbroken history of the upper Rio Grande.

Beginning with the mammoth hunters of eleven millennia ago, Carroll Riley adeptly eaves the threads of twelve thousand years of continuous history through the introduction of agriculture, the rise of the Basketmaker-Pueblo (Anasazi) people, and the extraordinary "quickening" that occurred along the Rio Grande and its tributaries as the Anasazi era ended.

At that time large towns appeared, some holding several thousand people who practiced irrigation-based agriculture, maintained complex social and political organizations, and had a rich artistry. This "golden age" was continuing when Spaniards contacted, then colonized and missionized the region. In 1680 the Pueblos joined in a powerful record and ousted the invaders. Although the Spanish returned, the Pueblos have maintained important parts of their cultural heritage to the present.