The Queen of Darkness - The Crystalline Dragons Saga, #4

The moment Dusk steps foot in the free lands of Inahan, he is arrested and imprisoned. However, it seems the Queen has heard of his power and she wants a private audience with him. When they dive into the dark depths below the castle to retrieve an artifact, Dusk wonders if he'll ever see the light of day again. I could hardly believe we'd finally made it to Inahan. After pirates, monsters, and a surprise visit from Tiernan, the capital city was a wonderful sight to behold.
But even in this safe harbor there are secrets that can tear the three of us apart. Queen Lobelia has us arrested and before I know it, I'm summoned to her throne to complete a task for her. One I can't refuse if I ever want to see my friends alive again. There's something hidden below the castle... something the Queen doesn't want the world to see.