This Wicked Curse (Realm of Monsters) by Amanda Aggie

Scarlet Midicious was born with a death sentence... She's been marked as a blood witch and promised to be wed to a monster on her twenty-third birthday. Her realm offers the king's daughters up as prizes to those who win the royal gauntlet. And this year, it’s her turn to play sacrificial lamb. But when a man with sin-drenched eyes and a smirk made of knives offers her a deal, she takes it. All she has to do is help him win the gauntlet—help him cheat—and he’ll give her freedom once they're wed. There’s just one catch... Captain Hook is a wanted criminal who kills blood witches. Read more