June 3, 2021
 When the villain in a novel is a descendant of Vlad the Impaler, you know there will be some medieval-style intimidation and retribution taking place. The time and place of the story, however, are modern, with computer technology and the opportunity for hacking playing a featured role in the plot. In contrast to the cruel impaler, the protagonist is Kolya Petrov, a likable Russian Jewish immigrant to the United States, who plays jazz piano when he isnât working on something at the Exe...