Tom Swift and The Visitor from Planet X

A young inventor and his friends confront a series of mysterious earthquakes that coincide with the arrival of an alien brain-energy transmission from Planet X. They investigate technical malfunctions and clandestine visitors while racing to prevent foreign scientists from capturing or weaponizing the energy, which could power autonomous robots and unprecedented machines. The story alternates laboratory problem-solving and inventive sketches with action set pieces—hijackings, a submarine transfer, a kidnapping, and an island showdown—culminating in the revelation of a robot spy and the hazardous device tied to the extraterrestrial force.