From These Ashes by Davidson King

A product of his past, Black spends half his time saving lives and the other half taking them. Every day, a hard choice must be made and he’s the man to make it. Long ago, he vowed to never love again; one-night stands with a willing body was all he ever needed. But along came Quill, and Black’s life is irrevocably changed. He never expects something as simple as Quill’s persistence to alter the way he not only sees the world, but how he lives it.

Quill has bad taste in men and equally horrible luck. Growing up wasn’t easy, surviving is even harder. When his past and present collide, he’s convinced he’ll finally witness his own destruction. But when an unlikely antihero steps in to protect him, his life is turned on its head. He’s spent months flirting with the man of his dreams and hoping he’d take notice. But it turns out, being on Black’s radar isn’t all it’s cracked up to be, and his idea of protection varies greatly from Quill’s.

Unknowingly sharing the same goal—burying their own pasts deeper than the fires of hell can reach—they’re both unaware that jumping into that fire will do more than ignite their feelings, it could lead to their own demise. Will Black and Quill be consumed by the flames, or from these ashes, will they find their own happily ever after?