A WORLD HALF IN DARKNESS. A SECRET SHE MUST BRING TO LIGHT. 2059. The world has stopped turning. One half suffers an endless frozen night; the other, nothing but burning sun. Only in a slim twilit region between them can life survive. In an isolationist Britain, scientist Ellen Hopper receives a letter from a dying man. It contains a powerful and dangerous secret. One that those in power will kill to conceal…