In Search of the Castaways
The novel on which the film is based is a sequel to two other novels by Jules Verne, "In Search of the Castaways" (1867) and "Twenty Thousand Leagues Under the Sea" (1870). The first book featured the island, the pirates and a character Tom Ayrton who was marooned on a nearby island. The second book featured Captain Nemo and the "Nautilus" presumed lost in the maelstrom at the end of that novel.