The fourth book in the urban fantasy series, Armageddon Angels, by Eric Swett (innocenteric).

Five years have passed since the Angel of Death made a very public appearance in the middle of New Arcadia. Since then, the city has become a hub of activity for the supernatural. Most people are blissfully unaware of the powerful forces at work in their city, and the darkness bubbling under the surface could not be happier.

Businessman and criminal kingpin Kohaku Hitaratsu finds his world turned upside down, and he is forced to seek refuge in the slums he left behind. He no longer rules the neighborhood that was the foundation of his empire, and he must find a way to survive on the streets with little more than a pickup truck to his name.

When Kohaku finds his neighborhood and his newfound home under siege by monsters better found in nightmares, he chooses to stand and fight rather than simply survive.

Standing up to the darkness draws the attention of forces better left alone, and Kohaku is caught in a tug-of-war between the all too familiar evils of his life and the light within that is struggling to get out.

Friends and relatives choose sides in his struggle, but ultimately it is the love of a woman that will determine his course and could decide the fate of the world.