This book advertises itself as a simple republication of the book-length essay, “Leonardo’s Last Supper,” that first appeared in the Art Quarterly in 1973 (Art Quarterly 36, no. 4, 1973: 297–410). Steinberg interlards the introduction with italicized passages; the first mentions Jonathan Crary’s invitation, in 1997, to republish the essay as a book, and another begins: “At this point, I might as well reprint the rest” (13). But the book is far from a reprint:...