Before becoming the man who introduced us to the wonders of the sea through his beloved television series, Jacques Cousteau was better known as an engineer and the inventor of scuba. He chronicled his early days of underwater adventure in The Silent World--a memoir that was an instant, international bestseller upon its publication in 1954. Now, National Geographic presents a 50th anniversary edition of this remarkable book, allowing readers to once again travel under the sea with Cousteau during the turbulent days of World War II.