"The name of Giacomo Casanova, Chevalier de Seingalt (1725-98), is now synonymous with amorous exploits, and there are plenty of these, vividly narrated, in his memoirs. But Casanova was not just an energetic lover. In his time he was a diplomat, businessman, trainee priest, traveler, prisoner, magician, confidence man, gambler, professional entertainer, and charlatan. He financed business projects, organized lotteries, wrote opera libretti, and dabbled in high politics. Above all he was an auto...