The sea, last great unexplored province of the globe with only 1% of its vast area mapped, is the subject of this really fascinating book. The sea is seen as an area of supreme importance in this era of atomic submarines and possible attacks from underwater. It is also seen as a potential of great wealth, with ""fish farms"", underwater mining and like operations now being studied. Underwater transportation in the form of submarine freighters, and underwater living in the form of vast cities from the water, are considerations which may soon become realities. Damming whole seas for new supplies of fresh water, exploring polar regions from under the ice, living to new and fantastic depths with devices like Piccard's or willing under the sea to test the inner substance of the earth (the current Mohole Pro is just a beginning) add to the excitement of the sea and its new possibilities for mankind. All given and yet stimulating treatment by this compendium of man's new challenge to explore and exploit.