"I've tricked and schemed and organized the overthrow of lawful government..." Mason felt a chill come over him. "I'm doing a terrible thing. I've let my people be trapped in a corner where their only hope of getting out alive is to follow me." ONE BOMB could demolish the entire undersea world. protected by a fragile. plastic dome . . . ONE MAN could save It, by betraying his country! A prophetic, gripping novel of the near future. when the earth's last frontiers are three miles down, at the bottom of the sea!