Power of the People: The Demon Cleaner Book 1

When nine Knight Commanders are brutally slain, Lillas, a demon cleaner, and her Triumvirate find themselves in an unlikely alliance with magicians and vampires. Their mission: unearth the killer before Isadora, now the formidable leader of the demon knights, unleashes chaos upon the city. After two years of peace at home, Lillas has forged bonds with her mother and her Triumvirate comrades. However, this newfound tranquility is shattered when an unknown assailant targets her age-old adversaries, the demon knights.
Now, Lillas must unmask the murderer before the annihilation of her sworn enemies jeopardizes everything she holds dear. Meanwhile, Izzy, the newly appointed head of the demon knights following the Knighthood's demise, faces the dual challenge of safeguarding the weaker members and uncovering the truth behind the Knights' murders. If she discovers Lillas's involvement, a war of epic proportions looms.