One hundred years ago, ship-builder Bowen Tyler, a handful of British allies, and the crew of the German U-33 submarine were lost at sea, drifting near the Antarctic Circle. What they discovered was something that defied time, and all of known science: the island of Caspak Hidden inside impregnable rock walls lay a prehistoric world, filled with terrifying creatures, man-eaters from every era of time, and races of savage, murderous primitives from...