The Dragon King: R.A. Salvatore

Book III of The Crimson Shadow. There is no peace for King Brind'Amour's newly liberated Eriador as Avon's evil King Greensparrow breaks the truce with border massacre and demon sorcery. War is inevitable but would be suicidal - even when allied with Dun-Darrow dwarfs, Fairborn elves and the Riders of Eradoch, Luthien Bedwyr and his friends are hopelessly outmatched by the enemy. Meanwhile, Brind'Amour's magic must face the fiends of Avon's sorcerous dukes. Will Luthien's magical alter ego, the Crimson Shadow, be enough to vanquish Greensparrow's ultimate weapon? Cover art by Harvey Parker.