Both language and content show that parts of the books date back to the time of the Spanish conquest of the Yucatec kingdoms (1527–1546).This holds even more true of the mythological and ritualistic texts, which, cast in abstruse language, plainly belong to esoteric lore.Spanish traditions Since many texts recur in various books of Chilam Balam, establishing a concordance and studying substitution patterns is fundamental to scholarship.The Books of Chilam Balam are referenced in The Falling Woman by Pat Murphy as source material for the description of sacrifices at Chichén Itzá.A poem from the Chilam Balam is prominently featured in a short story by the U.S.-born writer Lucia Berlin, who spent many years living and traveling in Latin America, including Chile and Mexico.