Michal Biran fills an important gap in research on the 13th-century Mongol empire with her recent study of Qaidu (1236–1301), a great-grandson of Chinggis Khan and champion of the house of Ögödei. Characterizing Qaidu as a pragmatist, not an “ideological warrior” (p. 107), she challenges the conventional view that he was one of the quintessential defenders of nomadic values against the sedentarizing ethos of other Mongol rulers, and that he claimed the office of qa⊂an (supreme Mongol overlord). The work argues that his long struggle with Qubilai and his ruling career in Central Asia had two main goals: to restore to the Ögödeid ulus its rightful territory according to the original division of the empire by Chinggis and to secure the political and economic viability of that territory. It concludes that Qaidu did not aspire to become the qa⊂an but played a crucial role in the emergence of an independent Chaghadaid khanate in the early 14th century.