By J. R. Ward
"As the son of a serial killer, homicide detective Thomas 'Veck' DelVecchio, Jr, grew up in the shadow of evil. Now, on the knife-edge between civic duty and blind retribution, he atones for the sins of his father - while fighting his inner demons. Assigned to monitor Veck is Internal Affairs officer Sophia Reilly, whose interest in him is both professional and arousingly personal. And Veck and Sophia have another link: Jim Heron, a mysterious stranger with too many answers ..."--Provided by publisher.
Severity reflects intensity, not value — “central theme” means a warning is a core part of the book, not that the book is bad.