The Dragon King (Crimson Shadow #3)

In volume one of this series, "The Sword of Bedwyr", young Luthien Bedwyr rebelled against the vicious rule of King Greensparrow and his cruel wizard-lords. In volume two, he made use of a magical cape that renders its wearer invisible—except for a lingering crimson silhouette. Now, the evil Greensparrow is back—and with a vengeance. Using dark, hideous magic, Greensparrow has taken the form of a massive dragon—a virtually unstoppable force that only Luthien can defeat.