Charla and the Rogue Watcher - The Six Worlds, #4

The centuries-old Watcher on Mellish has gone rogue and cut his ties to the Guardian so he can rule as Emperor. As long as he has the Guardian's Medalion, he will live on for many more years. Charla and Ben are reunited in a mission to find the Medallion and retrieve it so a new Watcher can be appointed. With them is the girl Ben loves and her boyfriend. To complicate matters, Ben is going through Dragonborn puberty.
Can Ben overcome his jealousy to complete this mission without setting the boyfriend on fire? And will Charla, the most annoying mermaid ever, save the day once again?