Twenty Thousand Leagues Under the Seas - An Underwater Tour of the World

"Twenty Thousand Leagues Under the Seas: A World Tour Underwater is a classic science fiction adventure novel by French writer Jules Verne; it was first published in 1870. The book was widely acclaimed on its release and remains so; it's regarded as one of the premiere adventure novels and one of Verne's greatest works, along with Around the World in Eighty Days and Journey to the Center of the Earth. The presentation of Captain Nemo's ship, the Nautilus, was considered ahead of its time, as it accurately describes many features of modern submarines, which in the 1860s were comparatively primitive vessels." -Wikipedia

"When an unidentified "monster" threatens international shipping, French oceanographer Pierre Aronnax and his unflappable assistant Conseil join an expedition organized by the US Navy to hunt down and destroy the menace. After months of fruitless searching, they finally grapple with their quarry, but Aronnax, Conseil, and the brash Canadian harpooner Ned Land are thrown overboard in the attack, only to find that the "monster" is actually a futuristic submarine, the Nautilus, commanded by a shadowy, mystical, preternaturally imposing man who calls himself Captain Nemo. Thus begins a journey of 20,000 leagues-nearly 50,000 miles-that will take Captain Nemo, his crew, and these three adventurers on a journey of discovery through undersea forests, coral graveyards, miles-deep trenches, and even the sunken ruins of Atlantis." -Goodreads

More readable version of "Twenty Thousand Leagues Under the Seas" from the Gutenberg library.