Olivia Zack is an aspiring neuroscientist, pharmaceutical consultant-and murder victim. It will take a post-mortem quest to sort through the mess that led to her death at the hands of a feckless mobster in Brighton Beach, Brooklyn-a death that might have been inadvertently caused by her former best friend Polly Warner. Celebrities, nightclubs, red carpets: Polly's life as a junior publicist sounds totally glam. Too bad it's a total sham. Overeducated,...