(This set of books includes "around the earth in 80 days", "adventures in the solar system", "five weeks in a balloon", "15-year-old captain", "from the earth to the moon", "mysterious island", "Captain Grant's children" and "journey to the center of the earth". Twenty thousand miles under the sea in 1886, when a large monster thought to be a narwhal was found at sea, the United States sent a warship to chase the "sea monster". Professor alonas, a French biologist, was invited to participate in the chase, but unfortunately fell on the back of the monster. In fact, the monster is a diving ship with wonderful structure - "parrot snail". Nemo, the captain of the diving ship, invited alonas to take a trip to the seabed. During the trip, they enjoyed the ever-changing strange landscape and all kinds of creatures on the seabed. During the voyage, there were many climaxes, including participating in underwater hunting, visiting underwater forests, visiting the ruins of Atlantis on the seabed, salvaging the treasure of a sunken Spanish ship, witnessing the funeral of the coral kingdom, fighting with octopus Repel the siege of the natives and so on. Finally, when the diving ship reached the coast of Norway, alonas left without saying goodbye and announced the secret of the seabed he knew to the world.)