The complex moral ambiguities of seduction and revenge make “Dangerous Liaisons†(1782) one of the most scandalous and controversial novels in European literature. Its prime movers, the Viscount de Valmont and the Marchioness de Merteuil — gifted, wealthy, and bored — form an unholy alliance and turn seduction into a game. And they play this game with such wit and style that it is impossible not to admire them, until they discover mysterious rules that they cannot understand. In the ensuing battle there can be no winners, and the innocent suffer with the guilty.