A signal from outer space reaches Earth and is broadcast over the radio, interrupting Joe Burke just as he is about to propose to his secretary and longtime friend, Sandy Lund. As it turns out, the signal is comprised of sounds resembling those of a flute. They are eerily familiar to Burke from a recurring dream he had as a child after his uncle gifted him with a number of relics found in a Cro-Magnon cave.

Though disappointed, Sandy returns to Burke’s engineering office where he plays a recording he made of the sounds years before and they are an exact match to those from space. Soon after, astronomers identify the source of the signal as an asteroid on a course that will bring it close to Earth.

Without sufficient evidence, the United States and Russia interpret the signals as a threat. The two major powers compete, and fail, to send a craft to the meet the aliens. However, Burke designs and constructs a small ship with the assistance of a yacht builder named Holmes and a taciturn electronics expert named Keller. Sandy’s sister Pam joins the team to assist with tracking orders and receiving shipments.

Early in their testing of a reactionless drive, an explosive mishap draws the attention of a reporter, two government agents, and the police. Burke tries to persuade them that he is building an advanced bomb shelter. They are not convinced and suspect Burke and company of conspiring with the aliens. A few days later, the police return to arrest them, but Burke launches the ship with Holmes, Keller, and the Lund sisters aboard.

A week and a half later, they reach the asteroid and fly the ship through a tunnel, which closes behind them. Lights, breathable air, and an artifcial gravity system are activated, allowing the intrepid voyagers to leave the ship. To their dismay, they find the asteroid devoid of life.

Burke and his team explore the interior and learn that it is a garrison, long abandoned by its troops. They also interpret the flute-like signal as a beacon ordering the ancient soldiers to return in order to defend against an approaching enemy. Who were the soldiers and where did they go? More importantly, can Burke and company learn how to operate the garrison in time to defend Earth against this powerful and unknown threat from interstellar space?

If you can ignore Leinster’s cardboard characterizations—such as the whiny and emotionally clueless Burke and the stereotypical capricious, husband-hunting women—The Wailing Asteroid is an enjoyable light-hearted adventure with a healthy dose of plausible 1960s science and engineering.