A classic thriller from the bestselling master of action & suspense The atomic submarine Dolphin has impossible orders to sail beneath the ice-floes of the Arctic Ocean to locate & rescue the men of weather-station Zebra gutted by fire & drifting with the ice-pack somewhere north of the Arctic Circle But the orders do not say what the Dolphin will find if she succeeds
- that the fire at Ice Station Zebra was sabotage & that one of the survivors is a killer