Raven’s Curse by Elle James

Some ghosts don’t haunt—they hunt.

The first body appears in Raven’s Cliff on a night thick with fog and fear. Marked with a single number and staged with ritualistic care, it’s only the beginning.
Sheriff Greer Hudson has seen violence before, but nothing like this. Each new victim carries another number. Each number another piece of a pattern she can’t yet decipher.
Chase Remington—former Air Force pararescueman and Raven’s Watch medic—recognizes the echo of a mission that went catastrophically wrong. Old scars rip open as he realizes the killer’s message isn’t random. It’s personal. One of their own has already fallen, and if they can’t catch a break, more will follow.
Bound by duty and hunted by a past they’d rather forget, Greer and Chase must rely on each other to survive. But trust is dangerous—and exactly what the killer intends to exploit.
Because the killer isn’t just after blood.
He wants them to feel every wound, every loss, every failure—before he destroys them.