Combining thrilling adventure with scientific facts and a wonder at the natural world, Twenty Thousand Leagues Under the Sea is Jules Verne's most enduringly popular novel. It begins when a vast black object is spotted menacing the oceans, causing panic over the world. When Professor Aronnax joins an expedition to hunt down the creature, he and his two companions discover it is a giant submarine, the Nautilus. Captured and held prisoner on board by its captain, Nemo - unpredictable, enigmatic, exiled from humanity - they have no choice but to travel the terrifying underwater depths with him.