Rise of the Ruthless by Davidson King

Ren Ikeda’s world is falling apart. War has broken out in the streets of Lucifer’s Landing, and his entire empire is being dismantled one explosion at a time. Unsure of his men’s allegiance, but desperately needing protection, he snatches up an opportunity when it lands in his lap. Hiring Mykel Finlay, his complete opposite in every way, has the markings of being disastrous. Realizing Mykel may be the only person he can trust, he clings to the man despite the danger to his heart.
Mykel Finlay doesn’t like bad guys. As ex-police and military, he prides himself on walking the line of good, not evil. When his brother gets in a bind with Ren Ikeda, the Japanese mob boss, he must put aside his moral compass and dive into the murky waters of the mafia. The only thing Mykel isn’t prepared for is falling in love and willingly drowning for Ren, a man he should hate.
With the help of some very unlikely allies, Ren and Mykel try staying alive long enough to take down their enemies and grab a happily ever after neither man thought they wanted. Will their salvation end up leading them down a path of destruction, or will they actually prevail?