The Kingdom by Jo Nesbø

Roy and Carl have spent their whole lives running from the darkness in their past, but when Carl finally returns to make peace with it, the two brothers are inexorably drawn into a reckoning with their own demons.

Roy has never left the quiet mountain town he grew up in, unlike his little brother Carl who couldn’t wait to get out and escape his troubled past. Just like everyone else in town, Roy believed Carl was gone for good. But Carl has big plans for his hometown. And when he returns with a mysterious new wife and a business opportunity that seems too good to be true, simmering tensions begin to surface and unexplained deaths in the town’s past come under new scrutiny. Soon powerful players set their sights on taking the brothers down by exposing their role in the town’s sordid history.

But Roy and Carl are survivors, and no strangers to violence. Roy has always protected his younger brother. As the body count rises, though, Roy’s loyalty to family is tested. And then Roy finds himself inextricably drawn to Carl’s wife, Shannon, an attraction that will have devastating consequences. Roy’s world is coming apart and soon there will be no turning back. He’ll be forced to choose between his own flesh and blood and a future he had never dared to believe possible.