The Royal Ranger : Arazan's Wolves
(Juvenile Book)

When Maddie and Will get a message that direwolves--huge misshapen changelings that are much larger than regular wolves--have been marauding and attacking through the hills and valleys of Celtica, the Rangers are sent on a mission to unravel just who or what is behind these dangerous creatures. Will isn't anxious to return to Celtica, especially approaching the Rift. And as they travel, Maddie must grapple with their growing dealings with the spiritual and supernatural. But they are Rangers--and they will do whatever it takes to accomplish their mission. After Will and Maddie discover the sorceress behind these strange and dangerous attacks, they must move quickly to take her down once and for all. Along the way, the Rangers must face direwolves, wargals, dark magic, and more. And as the sorceress Arazan's desires lead her to the most evil of powers, Will and Maddie must form a plan of action that can outwit even the darkest forces from the beyond.