Shadow Mountain Series by Indra Vaughn

Two towns flank the looming Shadow Mountain. A dark myth of the Predator drifts through the dense trees, a tale Police Lieutenant Hart never paid much attention to. When one unresolved death follows another—some people dying without discernible cause while others are clearly, and often brutally, murdered—he can't ignore it any longer. Truth may lie in myth, but this one is spread to deceive everyone. The Predator exists, but he's not entirely human... moreTwo towns flank the looming Shadow Mountain. A dark myth of the Predator drifts through the dense trees, a tale Police Lieutenant Hart never paid much attention to. When one unresolved death follows another—some people dying without discernible cause while others are clearly, and often brutally, murdered—he can't ignore it any longer. Truth may lie in myth, but this one is spread to deceive everyone. The Predator exists, but he's not entirely human. Hart will have to find the connection between the mysterious figure and victims with only one thing in common: a faint tattoo on the backs of their necks, a mark left when someone healed their incurable diseases.Isaac Lasko has been in love with Hart since he moved in across the street seven years ago. He’s been helping Hart renovate his home, and their friendship grows more intense with the years, but Isaac can't help wishing for a deeper bond. When he finally breaks through the lieutenant's armor, the mystery surrounding the Predator threatens them both. Help will come, but at a price. less

The capture of the Tattoo Murderer has demanded a heavy price. Doctor Tobias Darwin is dead, Lieutenant Hart is back in Riverside licking his substantial wounds, and he needs to gather his courage and tell Isaac he made a mistake. Isaac will forgive him—he knows that—but he can't promise Isaac an easy life. Being a cop comes with its own risks, after all. When they finally reach the same wavelength, their idyllic reprieve is cut tragically short... moreThe capture of the Tattoo Murderer has demanded a heavy price. Doctor Tobias Darwin is dead, Lieutenant Hart is back in Riverside licking his substantial wounds, and he needs to gather his courage and tell Isaac he made a mistake. Isaac will forgive him—he knows that—but he can't promise Isaac an easy life. Being a cop comes with its own risks, after all. When they finally reach the same wavelength, their idyllic reprieve is cut tragically short. Hart doesn't know yet that Isaac is terminally ill, that he will take off to find the Phoenix to heal him as a last resort. This time, it will be Hart who pays the price. In the meantime, a new killer roams the streets of Riverside. He kidnaps, tortures, and kills gay men in horrific ways, and he has the newly healed Isaac in his sights. Hart’s time is running out on every level. less