Joost Keizer is a senior lecturer in art history at the University of Groningen in the Netherlands. His previous books include The Realism of Piero della Francesca; The Transformation of Vernacular Expression in Early Modern Arts, coedited with Todd Richardson; and a book for young adults, This Is Leonardo da Vinci, with the illustrator Christina Christoforou.
"As a critical approach that also addresses Leonardo's way of thinking, Keizer's Leonardo's Paradox: Word and Image in the Making of Renaissance Culture, examines the interplay of word and image in Leonardo's work. He sees paradoxes as central: for example, a painting can lead to a better understanding of nature, or the meaning of an image can depend on its association with certain words. Though not necessarily part of Leonardo's vocabulary for inventive processes, paradoxes are part of his work."-- "Art Newspaper"