Appleton, Victor

Young inventor Tom Swift and his sister Sandy are invited to the opening of Apogee, the world's first space hotel, and are having a great time experiencing weightlessness, meeting the robotic staff, and playing zero-gravity badminton--until a billionaire guest goes missing.

When he arrives at a competition to race his new rocket-powered plane, Tom learns that some of the contestants have crashed during their test runs and decides to investigates the cause of the problem.

Tom, Bud, and Yo join Tom's dad on the S.S. "Nestor" to see Mr. Swift test his submersible, which he plans to use to search the sea floor for earthquakes, volcanic eruptions, and other phenomena, but when a storm hits, Tom risks his life to save his father.

Tom spots a tiny cube of polished granite orbiting the earth with a message on it in a language no one has ever encountered.

When he arrives at a competition to race his new rocket-powered plane, Tom learns that some of the contestants have crashed during their test runs and decides to investigates the cause of the problem.

The ocean has turned into an aquatic nightmare--squids, herring, and a shark have laid seige to the shore. Tom's latest experiment comes under suspicion as the source, but he is convinced the source is elsewhere and that humans are the next to be experimented on.

Tom, Bud, and Yo join Tom's dad on the S.S. "Nestor" to see Mr. Swift test his submersible, which he plans to use to search the sea floor for earthquakes, volcanic eruptions, and other phenomena, but when a storm hits, Tom risks his life to save his father.