The Endless Series Book Three: The Gatekeeper

The Endless Family bargained with faeries for their family fortune, selling off their sister to the Faerie King. When Emma Endless killed him to get her freedom, faerie turned from a world of fantasy into a world of nightmares. Now, Louisa Endless, the chosen Gatekeeper of faerie, must do the one thing she was born to: keep it safe. Even if it means doing so against her sister.