On the wind-scoured grasslands of the late twelfth century, clans raid, starve, and remember every insult in blood. Temüjin, son of a poisoned chieftain, should have died nameless. Instead he gathers the scattered stones of the tribes and forges them into one people under one law: the Yassa.

Barsbayar, called Bars, rides at his side from the first hard winters. He rescues the bride, swears the *anda* bond with the rival who will one day have to die, leads the charge against the walls of the Jin, and watches the scholar Li Wei - torn from a city of paper and ink - become the mind that teaches the horse-lords how to break cities. But when the shamaness Saran reads the sky and sees fire where the Khan sees only glory, Bars must decide what the Blue Wolf of legend truly demands: an empire that swallows the world, or a people that still know the names of their own horses.

From the kurultai of 1206 to the smoking gardens of Samarkand and the deathbed in the Tangut hills, this is the story of the making of the largest contiguous empire in human history - and of the men and women who paid for it with everything they once held sacred.

A sweeping epic of loyalty, destiny, and the terrible price of unity, set on the steppes of thirteenth-century Asia.