The shadow isle (Silver Wyrm, #3)

"Prepare to get lost in the magic" (VOYA) of Katharine Kerr's popular Deverry fantasy series. The Shadow Isle, the third novel in The Silver Wyrm cycle, weaves together many of the story strands of the fourth and final cycle of the Deverry chronicles. The wild Northlands hold many secrets—the mysterious island of Haen Marn, the mountain settlements of Dwarvolt, and the fortified city of Cerr Cawnen, built long ago by escaping bondmen from Deverry itself. As the Horsekin continue to push their religious crusade toward the borders of the kingdom, the humans of Deverry and their elven allies realize that the fate of the Northlands lies tangled with their own. Only the magic of Dallandra and Valandario and the might of the powerful dragons, Arzosah and Rori, can reveal the secrets that can save the Northlands and themselves from conquest.