Twelve-year-old Karn is a master gamer when it comes to playing Thrones and Bones. He’s not so good at striking hard bargains for the sake of his father’s tribe. If only there wasn’t so much pressure on him to be the next leader! Likewise, Thianna is a disappointment to her clan of ice giants, standing at only 7 feet tall, half the size of her peers. The two unlikely friends meet when their different tribes converge on an icy mountain for a tense round of trading. When unexpected enemies attack, they find themselves on the run, outracing wyverns and avoiding avalanches. Pulling on little-known Norse mythology, this brilliantly accessible fantasy really is for all those Percy Jackson fans clamoring for a new series. Grades 4–6.