Book excerpt: The first section of this volume brings together five studies on the Mongol empire. The accent is on the ideology behind Mongol expansion, on the dissolution of the empire into a number of rival khanates, and on the relations between the Mongol regimes and their Christian subjects within and potential allies outside. Three pieces in the second section relate to the early history of the Delhi Sultanate, with particular reference to the role of its Turkish slave (ghulam) officers and guards, while a fourth examines the collapse in 1206-15 of the Ghurid dynasty, whose conquests in northern India had created the preconditions for the Sultanate's emergence. The final three papers are concerned with Mongol pressure on Muslim India and the capacity of the Delhi Sultanate to withstand it.