From London's vilest slums to its grandest palaces, Wild Boy and Clarissa hunt a murderous poisoner in hope of proving themselves to a skeptical society. London, 1842. Wild Boy, master detective and former freak-show performer, and Clarissa, circus acrobat and troublemaker, are the secret last hope of a city beset by horror. A poisoner stalks the streets, leaving victims mad with terror--and then dead. Can the Black Terror be traced to a demon called...