Lists of books that Leonardo da Vinci made in his notebooks indicate that he was widely read and that written sources played a key role in the formation of his ideas. This exhibit of rare books and manuscripts from Stanford’s special collections explores themes related to Leonardo’s life and work—classical and vernacular literacy, philosophy, natural history, human anatomy and veterinary medicine, religion, astronomy, architecture, mathematics, optics, and cartography. It considers the question “How might Leonardo have engaged with this text?” and offers a window on the world of the Renaissance reader in general, and Leonardo in particular.