After the success of Jesse Eisenberg’s film A Real Pain, American readers seem ready to embrace a comic novel featuring a visit to a concentration camp. Reza, a French writer best known here for the plays God of Carnage and Art, brings her skill at high-energy dialogue to this story of three aging siblings, Jean, Serge, and Nana Popper, narrated by Jean. We meet him at the community pool where he’s taken his ex-girlfriend Marion’s 9-year-old son, Luc, to teach him to swim. “I’ve never been entirely sure who I am to him,” he comments, and the reader will need to pay close attention or find themselves in a similar boat with the throng of named characters who arrive in the pages that follow. For example, in describing the Sunday lunches held at their mother’s house before her recent death, Jean introduces a slew of family members: “Joséphine, Serge’s daughter, came to the doorstep every other week already exasperated. Victor, Nana and Ramos’s son, was training at the École Émile Poillot, the ‘Harvard of gastronomy,’ according to Ramos, who pronounces it ‘Harward.’” All these people are important, as are the culinary credentials of the mostly off-stage Victor, whose career options become a bone of contention among the extremely argumentative older generation. It is Joséphine who spearheads the family trip to Auschwitz; her father’s first reaction is indicative of the tone of the entire adventure: “You know, I paid through the nose for a course in eyebrows, and look where that’s gotten her, now she wants to go to Auschwitz, what’s wrong with this girl?” Like her cousin Victor’s, Joséphine’s employment goals are a hot topic in the family, but this family can argue about anything, and will, from the Judenrampe to the gas chamber to the Kraków Radisson and back. Final scenes in a hospital waiting room add poignancy to the mix.