What’s to be done about a jaywalking moose? A bear caught breaking and entering? A murderous tree? Three hundred years ago, animals that broke the law would be assigned legal representation and put on trial. These days, as Mary Roach discovers, the answers are best found not in jurisprudence but in science: the curious science of human-wildlife conflict, a discipline at the crossroads of human behavior and wildlife biology. Combining little-known forensic science and conservation genetics with a motley cast of laser scarecrows, langur impersonators and trespassing squirrels, Roach reveals as much about humanity as about nature’s lawbreakers.