In the fifth book of Nelson George's D Hunter mystery series, the eponymous former bodyguard has moved full-time to Los Angeles, becoming a talent manager and trying to put his past in New York City behind him. But it's not all smooth sailing. The Darkest Hearts is a crime-fiction novel that reflects the challenges of being a black businessperson in an era when the rules of entrepreneurship are constantly shifting due to technological advancements and an increasingly polarised political environment.