Riot Hearts (Sinners of St. Crow #1)

They might've been descendants of a saint, but they all sinned.
It took the death of her family to make Emory understand St. Crow is a city filled with monsters disguised in expensive suits and black ties. As the only heiress to the fortune her parents left behind, she is the most crucial pawn to power and one that everyone in the social elite is out to get. That includes River Sinclair— her annoyingly attractive childhood rival, who happens to be the son of the most ruthless businessman in town. While their lives may always intertwine, River isn't interested in pretending to be her friend—even when his father commands him to. Behind the cold mask, things are falling apart, and he blames her.
River makes sure she knows he hates her.
Emory makes it clear she isn't scared of him.
He says he wants to take her down.
So why is he the one falling?
Note: This book is the first in a duet and ends with a cliffhanger