Love
By Ferdinand Protzman
240 pages. National Geographic.

We're not talking hearts and flowers. But the international array of photographs in Love (National Geographic) radiates elation and pure contentment, devotion, desire, and pride—a tribute to human connection. Brassaï, Weegee, Elliott Erwitt, and Mary Ellen Mark are among the heat-seeking photographers who capture the ghost of a smile, the clasp of a hand, the embrace in the dark.