Giddy sugarplum or calculating bitch? Pretty Konstanze aroused strong feelings among her contemporaries. Her in-law's loathed her. Mozart's friends, more than forty years after his death, remained eager to gossip about her "failures" as wife to the world's first superstar. Maturing from child, to wife, to hard-headed widow, Konstanze would pay Mozart's debts, provide for their children, and relentlessly market and mythologize her brilliant husband. Mozart's letters attest to his affection for Konstanze as well as to their powerful sexual bond. Nevertheless, prominent among the many mysteries...