Scorpion Mountain by John Flanagan

In this thrilling installment of the Brotherband Chronicles, the young crew of the Heron embarks on a perilous mission to protect Princess Cassandra from a deadly assassination plot. As they navigate treacherous waters and face formidable foes, the crew must rely on their wits, courage, and camaraderie to thwart the sinister plans of the Scorpion cult. With danger lurking at every turn, the Heron brotherband must confront their fears and push their limits to ensure the safety of their kingdom and its future.

Purchase from Bookshop.org