In this quiet and devastating novel about the rise of fascism, Siggi Jepsen, incarcerated as a juvenile delinquent, is assigned to write a routine German lesson on the “The Joys of Duty.” Overfamiliar with these joys, Siggi sets down his life since 1943, a decade earlier, when as a boy he watched his father, a constable, doggedly carry out orders from Berlin to stop a well-known Expressionist artist from painting and to seize all his “degenerate” work.…