Zen art poses a conundrum. On the one hand, Zen Buddhism emphasizes the concept of emptiness, which among other things asserts that form is empty, that all phenomena in the world are illusory. On the other hand, a prodigious amount of artwork has been created in association with Zen thought and practice. A wide range of media, genres, expressive modes, and strategies of representation have been embraced to convey the idea of emptiness. Form has been...