"A biographical account of engineer Otis Barton and naturalist Will Beebe's record-setting descent into the deep ocean in their Bathysphere craft, making the men the first humans to witness deep sea creatures in their natural habitat" --
Describes the 1934 dive of a bathysphere, or "sphere of the deep," in which two explorers, William Beebe and Otia Barton, set the world depth record and saw mysterious creatures of the deep ocean.