Scorpion Mountain - John Flanagan

Hal, his Brotherband crew, and the Ranger Gilan have freed the twelve Araluens sold into slavery. Returning to Araluen, Gilan is given a new mission by King Duncan: protect his daughter’s life. Princess Cassandra has survived one attempt on her life already, and now whispers of a second attempt have reached the kingdom. A deadly sect known as the Scorpion Cult is thought to be behind the assassination threat.

Not waiting to see if the knife will strike true, the Brotherband again team up with Gilan to track down the would-be killers.

In this fifth book in the Brotherband Chronicles, old friends reemerge to take on new enemies as the worlds of Ranger’s Apprentice and Brotherband join forces in battle!