Blood of Sirens — Bonnie Lamer

Xandra believes Sirens are creatures of myth. At least, she does until they escape from the prison that has held them for centuries and they come seeking revenge. Now, their magic is unstoppable. Even a Witch Fairy's magic isn't strong enough to stop the Sirens from singing their death call. With only six nights to find a solution before all the males she loves are taken from her, Xandra must find a way to stop them.