"20.000 Mijlen onder Zee: Oostelijk Halfrond" by Jules Verne is a science fiction novel published in 1870. When a mysterious sea monster terrorizes ships worldwide in 1866, Professor Pierre Aronnax joins an American expedition to hunt it down. After falling overboard, he discovers the "monster" is actually the Nautilus, an advanced submarine commanded by the enigmatic Captain Nemo. Held captive but treated as guests, Aronnax and his companions embark on an extraordinary underwater journey spanning 80,000 kilometers through the world's oceans, encountering wonders and dangers beneath the waves.