Only a Monster. the twisted romantic fantasy debut where monsters are the heroes?

'You're a hero and I'm a monster. There's only one way that story ever ends.' It should have been the perfect summer. Sent to stay with her late mother's eccentric family in London, sixteen-year-old Joan is determined to enjoy herself. She loves her nerdy job at the historic Holland House, and when her super cute co-worker Nick asks her on a date, it feels like everything is falling into place. Then a Good Samaritan attempt gone wrong sends Joan spinning through time, and her life quickly begins to unravel.
Her family aren't just eccentric: they're monsters, with terrifying, hidden powers. And Nick isn't just a cute boy: he's a legendary monster slayer, who will do anything to bring them down. As she battles Nick, Joan is forced to work with the beautiful and ruthless Aaron Oliver, heir to a monster family that hates her own. She'll have to embrace her own monstrousness if she is to save herself, and her family.
Because in this story .