The global understanding of enslavement owes a great deal to the efforts of scholars who research its history in non-Atlantic societies, including Muslim-majority ones. In recent years, the study of enslavement in the Middle East and North Africa has achieved a volume, a dynamic, and a maturity that make it one of the leading, cutting-edge subfields in studies encompassing that part of the globe. Reilly’s Slavery, Agriculture, and Malaria in the Arabian Peninsula is a worthy contribution to this growing literature, covering a significant lacuna in nineteenth- and twentieth-century Arabia with extensive and often innovative research.