The Dragon King (Crimson Shadow #3)

In The Sword of Bedwyr, young Luthien Bedwyr rebelled against the crushing rule of King Greensparrow and his cruel wizard-lords. To save his once proud land of Eriador, Luthien was given a magical cape that renders its wearer invisible--but leaves behind an indelible scarlet silhouette. In Luthien's Gamble, Luthien--the Crimson Shadow--was successful in bringing Greensparrow and his forces to heel. But now the vile king is back with a vengeance. Using dark and hideous magic, Greensparrow has taken the form of a mammoth dragon--and he will not be stopped!