The Missing Kin — Michael Pryor

While Adalon and his friends Targesh and Simangee gather supporters at the Lost Castle, the mad Queen Tayesha and her ruthless general continue to wage war on the Seven Kingdoms of Krangor. It is only when Simangee finds a legend in an ancient text that the rebels begin to have renwed hope. Do the Missing Kin of the saur really exist? Can the three friends find the winged saur and convince them to join their cause before the war is lost?