Irving Albert Leonard (December 1, 1896 in New Haven, Connecticut – October 1, 1996 in Alexandria, Virginia) was an American historian and translator, specialising in Hispanic history and art. His best known publications are Books of the Brave (1949) and Baroque Times in Old Mexico: Seventeenth-Century Persons, Places and Practices (1959), which won the Conference on Latin American History award for the best book in English. Books of the Brave, a valuable account of the introduction of literary culture to Spain's New World, was updated in 1992. He had many papers published in the American Historical Review and the Hispanic American Historical Review, such as A Frontier Library, 1799 (Feb. 1943, vol. 23, no. 1, p. 21–51). In 1960, Leonard served as chair of the Conference on Latin American History, the professional organization of Latin American historians.
- Leonard, Irving Albert (1992). Books of the brave: being an account of books and of men in the Spanish Conquest and settlement of the sixteenth-century New World. University of California Press. ISBN 978-0-520-07990-8. Retrieved 25 January 2011.