Third high-octane installment in the bestselling author's compelling Jack Courtney Adventures for readers 9-12, following CLOUDBURST and THUNDERBOLT. On the pretext of making a film for his mother's environmental protection work, Jack wangles an expedition to the Arctic with his friends Amelia and Xander and cousin Caleb. But Xander's investigations into the mysterious backers funding their adventure raises Jack's suspicions. Is the renewable energy...