“A tour de force, UNDOCUMENTS breaks rules and creates new ones. Through deft handling of texts, both theoretical and historical, Rivera offers us a compendium of diverse people and items such as documents, poems, the Florentine Codex, Anzaldúa, Bataille, [and] philosophy, along with objects like el molcajete. Using a true mestizaje of genre and approaches, he cooks up a rich poetic stew that is stimulating, intriguing, and nourishing.”—Norma Elia Cantú, author of Cabañuelas: A Novel