Trinity by Shayne Silvers — book slip

War is coming to the City of Fountains. The Four Legendary Creatures are free, the Seven Sins are running wild, and the Vatican is ready to enter the front lines. Callie Penrose, the Horsewoman of Despair, is at the heart of it all. As the streets of Kansas City threaten to become rivers of blood, Callie must choose between her heart and the people who depend on her. With Heaven's pillars crumbling, she discovers that the chaos is no coincidence, and betrayal lurks among her closest friends. Can Callie navigate the treacherous waters of power and loyalty, or will humanity burn in the wake of a Horsewoman scorned?

For fans of urban fantasy with a dark twist.