A message in a bottle relays an urgent plea from the long-missing Captain Grant. His ship, the Britannia, has sunk. He is alive but is being held hostage. Captain Grant's children, Mary and Robert, along with their friend and benefactor Lord Glenervan launch a rescue expedition. But where do they begin their search? The original SOS message written in three languages is partially destroyed by sea water. The remaining fragments can be interpreted several ways. Only one clue is certain, Captain Grant is somewhere along the 37th parallel. Racing against time, risking their lives, the brave adventurers are determined to find and save the shipwrecked captain.
A story of castaways, similar to Robinson Crusoe and The Swiss Family Robinson, this book details the escape from Civil War-era Richmond, Virginia, of five Northern men who dared to go aloft in a balloon in the midst of a hurricane. Deposited on a lonely island in the Pacific, they make do with Yankee ingenuity where Chance has left them nothing. Only later do they find they have a hidden benefactor: Captain Nemo, of 20,000 Leagues Under the Sea, who resides, alone, secretly on the island. In time, the tiny colony becomes so prosperous that it is able to rescue another castaway from an island a hundred miles away. But all their work will come to naught - their island's volcano is about to awake!
French Professor Aronnax and his servant join the Abraham Lincoln, an American frigate, on a mission to find and destroy a "sea-unicorn of colossal dimensions, armed not with a halberd, but with a real spur, as the armored frigates." The undersea monster is thought to be responsible for the disappearance of over 200 ships.