Dragon Blade : The Book of the Rowan (Cycle of Oak, Yew, Ash, and Rowan)
by Andre Norton
Tor Books Hardcover ISBN/ITEM#: 0765307472
Date: 01 August, 2005 List Price $24.95 Amazon US / Amazon UK /
From Front Flap: Over a year has passed since the defeat of the Great Foulness, and the ravaged earth has begun to heal. Lost generations, the signet rings of the Four Great Houses--Oak, Yew, Ash, and Rowan--have been restored to their rightful heirs. And Ashen NordornQueen, mistress of the Land of Ever Snow, looks forward to alife of peace and happiness with her beloved husband and their newborn son--only to learn that an ancient evil still threatens all that she holds dear.
(Source: Tor Books)