Cloak of Ashes — Jonathan Moeller

My name is Nadia, and I'm a shadow agent of the High Queen of the Elves.I don't have many friends, but I look after the ones I do have...and I pay my debts.So when Hakon Valborg's teenaged granddaughter Lydia is arrested for the murder of her computer science teacher, I agree to help.But there's more going on here than just murder.Because an ancient enemy of both humans and Elves just might have taken up residence in Lydia's high school...