Dragon War

Blurb

Dragon War is a fantasy novel Chinese-American author Laurence Yep first published in 1992. It is the fourth and final book in his Dragon series. Yep attempted to put the beauty and gallantry of dragons he had gleaned from his research of them in Chinese mythology into Dragon War. By contrast, in the first three books of the series he "had tried to capture their quirkiness and strength".
The story picks up where Dragon Cauldron left off. Exiled dragon princess Shimmer along with Indigo and Monkey attempt to rescue Thorn, whose soul is trapped within Baldy's cauldron. The cauldron is now possessed by the powerful immortal wizard known as the Boneless King, who has possessed the body of the tyrannical human king known as the Butcher and launched an all out war against the dragons with the aid of Shimmer's brother Pomfret.