The history of the American West has usually been seen from the perspective of American expansion. Drawing on previously unexplored primary sources, James E. Officer has now produced a major work that traces the Hispanic roots of southern Arizona and northern Sonora—one which presents the Spanish and Mexican rather than Anglo point of view. Officer records the Hispanic presence from the earliest efforts at colonization on Spain's northwestern frontier through the Spanish and Mexican years of rule, thus providing a unique reference on Southwestern history.