Who would have thought that the early history of Sonora and Arizona was so deeply influenced by the arrival and long-term presence of German-speaking Jesuit missionaries during the 18th century? Prof. Classen offers a highly engaging study of these brave and intelligent men who had dedicated their adult lives to missionary activities in that semi-arid desert and who wrote extensive reports and sometimes maintained a large correspondence (Segesser) with their families back home. On the basis of those documents (in German!) Prof. Classen gives us a most vivid picture of how these European missionaries confronted the New World, how they coped in the cacti-filled desert, and how they reached out to the native population. This book truly opens a new chapter in the history of the Southwest, demonstrating, from an unexpected perspective, the deep impact of German speakers on 18th-c. Sonora.