Shadow magic novels

Thorn, a boy sold into slavery who must serve the royalty of Castle Gloom for a year and a day to earn his freedom, and Lilith Shadow, the 13-year-old ruler of Gehenna, who is forbidden to practice the magic that is her heritage, join forces to solve the murders taking place in Gehenna.

In Book 3 of a three-book series, when Lily, aka the "witch queen" and bat-rider extraordinaire Thorn travel to Sultanate of Fire, things go terribly wrong. Instead of celebrating a reunion with their old friend K'leef, they are thrust into royal murder, an epic quest, and a deadly battle for the throne. While investigating the murder, Lily learns shocking truths about her life that could destroy all she has achieved. Yet, among the ruins of her old...