Since their original appearanc more than two decades ago, Michael Kurland's two novels feature Professor James Moriarty--The Infernal Device and Death by Gaslight--have been among the most acclaimed of the works based on the characters first introduced by Authur Conan Doyle. In Doyle's original stories, Professor Moriarty is the bete noire of Sherlock Holmes, who deems the professor his mental equivalent and ethical opposite, declares him "the Napoleon...