The Demon Hunters: The Serpent's Coin. The Demon Hunters, #2

[Previously published as Raven by Charity Bishop.]A cursed coin. A city drowning in sin. A darkness that wears a familiar face. In the rain-slicked streets of 1920s San Francisco, spiritual private eye Byron Hayes is no stranger to the darkness that lurks behind mortal eyes. When a corrupt slumlord's car plunges off a cliff, Byron is called to a scene that reeks of more than just gasoline and fear.
He discovers an ancient Roman coin, an artifact pulsing with a malevolence so profound it poisons the very air-a relic tied to the ultimate betrayal, now home to a demon with two faces. Just as this new evil bleeds into the city, Byron's world is upended by a miracle: his sister, Nora, awakens from a fifteen-year, demon-induced madness. But her recovery feels fragile, a flickering candle in a rising storm.
He and his gifted, street-smart ward, Raven Rossi, soon realize their protected home is no longer a sanctuary. The cursed coin is only the beginning. A far more ancient and powerful demoness has come to claim San Francisco, and she is unleashing hell one Deadly Sin at a time through a series of cursed objects. From a painter's brush that inspires violent envy to a starlet's ring that fuels insatiable lust, the demonic artifacts turn the city's inhabitants into puppets of their own worst impulses.
Hunted by a serpent-like evil and navigating a web of spiritual corruption that reaches the highest echelons of power, Byron and Raven must fight a war on two fronts. They must not only banish the demons from these cursed objects, but also conquer the insidious temptations they awaken in their own hearts. Can they unmask the master of this chaos before the city-and their own souls-are devoured by sin?