This adaptation of what is recognized today as the oldest Mongolian text (written two decades after Chingis Khan's death) tells the Mongols' own version of the origin of their nation, the life of Chingis Khan, and the creation of an empire that stretched across Eurasia in the thirteenth century. Adapted from Francis Woodman Cleaves' erudite translation, it is presented here as a narrative poem in colloquial English. An overview of medieval Asia, maps, lineage charts, a glossary of proper names, and a bibliography are included. This expanded edition includes a seventeenth-century account of Chingis Khan's death and a recent essay by the editor.