On April Fool's Day in 1856, a shape-shifting grifter boards a Mississippi riverboat to expose the pretenses, hypocrisies, and self-delusions of his fellow passengers. The con artist assumes numerous identities - a disabled beggar, a charity fundraiser, a successful businessman, an urbane gentleman - to win over his not-entirely-innocent dupes. The central character's shifting identities, as fluid as the river itself, reflect broader aspects of human...