Geoff Dyer’s The Ongoing Moment is a work of “imaginative criticism” that focuses on content rather than form, and successfully develops new discursive categories for photography. He covers the work of Paul Strand, Diane Arbus, Alfred Stieglitz, Bruce Davidson, and William Eggleston, among many others, and compares different ways of seeing oft-shot phenomena like trains, barbershops, nudes, and the blind.