[Baen] A science fiction classic, with an all-new celebrity introduction and afterword! A nuclear holocaust throws a brave and tough-minded family into a future where they are considered traitors and sub-humans and where they must fight tooth-and-claw to avoid becoming slaves to the benighted survivors of the war. A Robert A. Heinlein classic reissued with an all new celebrity forward by noted Heinlein biographer Bill Patterson and afterword penned by three-time award-winner for fan writing and science fiction scholar John Hertz. It’s a cross-time fight for freedom as a family retreats to a bomb shelter during a nuclear attack – only to emerge hundreds of years in the future, thrown forward in time by the blasts. There lifeboat ethics rule as they struggle to survive…until they’re discovered by up-time humans, the survivors of the apocalypse. These survivors are of African descent. Down-time humans – in fact, all of the European-descended – are held guilty for the state i