Forever Dark — Linda Jackson

Camilla has spent the last three years of her life living a miserable existence after her parent's murder. However, a simple trip to the grocery store is about to change her life entirely. Dragged into a world of fantasy beasts and undead creatures, Camilla soon uncovers her heritage. The creature who killed her parents is hot on her trail, and she is the only one who can kill him. Joining forces with a group of supernatural soldiers, Camilla struggles to be the warrior she was born to be. Their leader is a fearsome man who has bound his soldiers to him through a blood oath. Camilla's presence causes a rift in his obedient army. She has given the soldiers a reason to fight for their freedom, but in order to grant it she will have to sacrifice herself to their leader, living eternity as his prisoner.