Richard Godwin's dark thriller, Apostle Rising, is one helluva a ride, with all the violence and insanity found in his short works. Unlike his short stuff, this one is mainly from the perspective of the cops rather than the criminals.
Inspector Frank Castle's career has been defined by his inability to solve a string of murders two decades ago. When a new serial killer is on the loose showing clear similarities to the first, Castle quickly becomes obsessed. And as nemesis/prime suspect/religious nut Karl Black mercilessly taunts him, Castle becomes increasingly pathetic and hits the bottle hard.
As you might expect, this ain't your granddaddy's police procedural. With plenty of gore and a relentless pace, you'll find yourself compulsively moving on to the next chapter every time. And Godwin's got a phenomenal twist in store that I doubt you'll see coming.