The American photographer Vera Mercer's (b. Berlin, 1936; lives and works in Omaha and Paris) oeuvre defies easy summary. She started taking pictures in Paris in the 1960s, making portraits of her then husband Daniel Spoerri--who, like she, was initially training as a dancer--and other members of the Fluxus group and Nouveaux R?alistes, including Emmett Williams and Robert Filiou, Jean Tinguely and Jacques Villegl?. Around the same time, she also...