TOM SWIFT AND HIS
DEEP-SEA HYDRODOME

by VICTOR APPLETON II

From the moment Tom Swift finds himself tossed about helplessly in an undersea geyser to his rendez- vous with imprisonment or death at the hands of his enemies, the young inventor fights to overcome incredible odds and obstacles in his latest daring project: drilling for valuable helium gas in the depths of the sea.
    Tom's revolutionary water-repel- ling machine makes possible the construction of his hydrodome, an underwater city of derricks and tanks amid the crushing pressures of the ocean floor. But the strange undersea mountain that looms over Helium City is stalked by a phantom submarine that threatens the subocean workers, and the entire world, with a banned neuro- toxin of fantastic potency.
    Tom struggles to uncover a ruthless spy and saboteur with a grudge against the Swifts in a tale of high-voltage peril and suspense that stretches from Swift Enter- prises to the shadowed floor of the ocean deep.
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