The Toil and Trouble Trilogy, Book Three
by Val St. Crowe
After her ex-boyfriend-turned-monster Brice attacks with a berserker army, Olivia realizes that Brice is the most powerful berserker ever. He controls the monsters with his magic, and he’s obsessed with one thing: getting revenge on Olivia.
Olivia never wanted to kill Brice, but if she doesn’t, he’ll destroy not only her, but the entire city.