Skeleton Key Book Series One Skeleton Key. Endless Adventures. Arizona Creed lost her assassin father, and her whole world changed. Literally. With one magical skeleton key, Arizona lands in another realm. Forget Earth. Terlant is the place to be. And Lucifer wants her there, the dashing man with no last name and more secrets than even she has. But love isn’t always enough. Arizona must find purpose in her new life. The Royal Guard could give Lucifer and Arizona what they desire. They only need to pass two tests to win the Game and enter the elite Guard. But is her real test to open her heart to true love? And will she win her wings to fly into his arms?