One of the great documents of colonial Mexico, the Codex Chimalpopoca chronicles the rise of Aztec civilization and preserves the mythology on which it was based. Its two complementary texts, Annals of Cuauhtitlan and Legend of the Suns, record the pre-Cort sian history of the Valley of Mexico together with firsthand versions of that region's myths. Of particular interest are the stories of the hero-god Quetzalcoatl, for which the Chimalpopoca is...