Around the World in Eighty Days (French: Le tour du monde en quatre-vingts jours) is a classic adventure novel by the French writer Jules Verne, first published in 1873. In the story, Phileas Fogg of London and his newly employed French valet Passepartout attempt to circumnavigate the world in 80 days on a £20,000 wager (equal to £1,324,289 today) set by his friends at the Reform Club. It is one of Verne's most acclaimed works.                                                
Twenty Thousand Leagues Under the Sea (French: Vingt mille lieues sous les mers) is a classic science fiction novel by French writer Jules Verne published in 1870. It tells the story of Captain Nemo and his submarine Nautilus as seen from the perspective of Professor Pierre Aronnax.
The expedition sets sail from Brooklyn aboard a naval ship called the Abraham Lincoln, which travels down around the tip of South America and into the Pacific Ocean. After much fruitless searching, the monster is found, and the ship charges into battle. During the fight, the ship's steering is damaged, and the three protagonists are thrown overboard. They find themselves stranded on the "hide" of the creature, only to discover to their surprise that it is a large metal construct. They are quickly captured and brought inside the vessel, where they meet its enigmatic creator and commander, Captain Nemo.
The rest of the story follows the adventures of the protagonists aboard the submarine, the Nautilus, which was built in secrecy and now roams the seas free of any land-based government. Captain Nemo's motivation is implied to be both a scientific thirst for knowledge and a desire for revenge on (and self-imposed exile from) civilization. Captain Nemo explains that the submarine is electrically powered, and equipped to carry out cutting-edge marine biology research; he also tells his new passengers that while he appreciates having an expert such as Aronnax with whom to converse, they can never leave because he is afraid they will betray his existence to the world. Aronnax is enthralled by the undersea vistas he is seeing, but Land constantly plots to escape.