Here Be Monsters — Phaedra Weldon

She is a Vampire. He is an Elf. His blood can give her the daylight again; but it can also restore power to an ancient race known as The Fallen, bent on destroying both Vampire and Elf. There is a forbidden curse that could destroy the Fallen, and save both races…

…but in order for it to work, the one who carries it must sacrifice their life.

The story of Siobhan O'Donnell and Abyssinian Geld continues in this sequel to Mirror, Mirror.