This Savage Song

This Savage Song is the first book in the Monsters of Verity duology written by Victoria Schwab.

Synopsis
There's no such thing as safe in a city at war, a city overrun with monsters.

Kate Harker and August Flynn are the heirs to a divided city—a city where the violence has begun to breed actual monsters. All Kate wants is to be as ruthless as her father, who lets the monsters roam free and makes the humans pay for his protection. All August wants is to be human, as good-hearted as his own father, to play a bigger role in protecting the innocent—but he's one of the monsters. One who can steal a soul with a simple strain of music. When the chance arises to keep an eye on Kate, who's just been kicked out of her sixth boarding school and returned home, August jumps at it. But Kate discovers August's secret, and after a failed assassination attempt the pair must flee for their lives.

Plot
WARNING: SPOILERS AHEAD

Prelude
Kate Harker decides to burn down a church in her Catholic school, St. Agnes Academy, after failing to get herself kicked out for doing a variety of other things. She hopes that this will be the last time she gets sent to another school, and that her exile from her father's home in Verity will end.

An hour after her success, Kate gets driven to her father's house through the sub-city of Des Moines Kate and August are a phat ship

Trivia

 * The novel's working title was "Monster."