City of Gods and Monsters (House of devil #1) by Kayla Edward

Welcome to the city of Angelthene. We hope you survive.

Loren Calla has only ever been ordinary. As a human struggling to survive in a city that caters to the needs of vampires, werewolves, witches, and other supernatural creatures, she always assumed her life would remain simple, predictable, and as safe as her world would allow.

Until she barely escapes abduction at the hands of Darkslayers—supernatural bounty hunters that possess the Sight, a magical tracking ability that allows them to see a person’s aura—and one of her friends is taken in her place. The abductors are demanding a ransom: Loren’s life in exchange for her friend’s safe return. Loren will do whatever it takes to get her friend back—even if it means accepting help from Darien Cassel, the leader of the Seven Devils, the most feared Darkslaying circle in the city.