Dino Quest: The Mammoth Riders

"In just a few days, Moss's life has been turned upside-down. He's tamed a mighty T. rex, befriended a warrior princess, and saved the kingdom of Primordia from a rebellion. But his adventure is far from over. A mysterious force is turning the people of noble Primordia and its neighboring kingdom-the frozen Chillands- against each other. Can Moss and Princess Opal stop the kingdoms rushing into a war that seems inevitable?"--Provided by publisher.