Earl and the fairy

During one of her rare trips to visit her father in London, Lydia, who is a doctor and a fairy, is rescued from kidnappers by a young man who needs her help to claim his birthright as ruler of the fairy kingdom.

"Lydia has been trapped in a warehouse by Rosalie, a dangerous young woman who commands a bogey-beast and wants Edgar all to herself. What's more, Lydia has realized that she is in the storehouse where Edgar was first enslaved as a child. Can she discover the secret of his dark past, or will she fall prey to the bogey-beast's true master?"--Publisher.