Book excerpt: Under suspicion for a virtual break-in at Fort Knox, 17-year-old Carl Hobbes finds himself on a rendition flight for questioning by the US military. Taken to an isolated camp in the Arctic wilderness, dedicated to holding terrorists-for-hire, the boy finds all assurances about his safety blow away when one notorious detainee stages an uprising. Cut off from civilisation, and with overnight temperatures plummeting, Hobbes must decide whether his chances of survival are greater inside the cage - or out…