The Stolen Heir
(Book)

Series information from Goodreads.

Eight years have passed since the Battle of the Serpent. In the icy north, Lady Nore of the Court of Teeth has reclaimed the Ice Needle Cathedral. She has produced a monster of stick and snow who will do her bidding-- and exact her revenge. Suren, child queen of the Court of Teeth, fled to the human world and lives in the woods. When she is chased through the streets by the hag Bogdana, Suren is saved by Prince Oak, the heir to Elfhame-- and the boy she was once promised to in marriage. He wants Suren's help on a mission-- but can she trust him? -- adapted from jacket

Ages 14+.,Little, Brown and Company.