Thirteen-year old Owl has never met her father, and her mum is very mysterious when she asks about him. When Owl discovers strange frost patterns on her skin, she decides it's time to find out who he is. A strong female lead character who struggles with identity, friendships and an absent father - this is another book that borrows from old folklore and fairytales, bringing it to a modern setting. Again probably more towards the older age, so I'd say 10-12.