The Spectral Blaze. A Brotherhood of the Griffon Novel

Aoth finds himself in the crosshairs of a dangerous game-one with stakes of gold, blood, and the kingdoms of the Forgotten Realms. Aoth and the Brotherhood of the Griffon have succeeded in rescuing Tchazzar-the lost king of Chessenta and a formidable red dragon-and are rewarded with a contract to aid in his war with a powerful dracolich. But the more Aoth sees of the war, the more suspicious he becomes that the Brotherhood may be just a pawn in a cutthroat draconic game that puts whole kingdoms at risk-a game played for stakes of gold and blood.
And the more he sees the game play out, the more he realizes that he will have to become a player in this most dangerous of games if he wants the Realms to remain free.