The Letter for the King (The Letter for the King, #1)

When sixteen-year-old Tiuri answers a desperate call for help, he finds himself on a perilous mission that could cost him his life. He must deliver a secret letter to the King who lives across the Great Mountains - a letter upon which the future of the entire realm depends. It means abandoning his home, breaking all the rules and leaving everything behind - even the knighthood that he has dreamed of for so long.