Along with his diminutive but dauntless sidekick, Bigman Jones, David “Lucky” Starr travels from Earth to Venus when fellow Council of Science member and longtime friend, Lou Evans, is charged with corruption and theft of an experimental yeast formula.

During their flight to Venus, a message from Evans warns Starr to stay away from the planet. This of course only entices Starr to press onward. As they approach Venus, Starr and Bigman discover that their pilot and navigator have succumbed to mind control and turned against them, sending the vessel crashing into the ocean.

After a brief scuffle, the pilot and navigator regain control of themselves, but recall nothing of the incident. Starr and Bigman repair the vessel and dock in the underwater dome city of Aphrodite. There, Starr and Bigman meet with senior council member, Doctor Mel Morriss, only to learn that previous incidents of mental aberrations have occurred in the recent past—and Lou Evans might himself be a victim.

Starr requests an interview with Evans, but his fellow councilman is reluctant to explain his actions. Their conversation is then interrupted by an emergency—a junior engineer has fallen victim to mind control and is threatening to open one of the airlocks and flood the entire city! Worse, Lou Evans takes advantage of the distraction to escape in a personal submarine into the oceans of Venus.

Can Lucky Starr save the underwater town of Aphrodite from destruction, recapture his fellow councilman, and solve the mystery behind the mind control before the next incident destroys every living human on Venus?

Lucky Starr and the Oceans of Venus is the third book in the series and is just as entertaining as the previous entries. Asimov creates a clever and plausible mechanism by which the mind control is executed.

The feisty Bigman is noticeably more subdued than in the first two volumes. His most heroic moment is hustling through the city’s ventilation shafts in an effort to cut off power to the airlock before the engineer can flood the city. After that, Bigman is reduced to steering a ship and asking Lucky for clarification about certain scientific concepts during their adventures.

In the 1972 Signet editions of the series that I’m reading, Asimov added a disclaimer regarding the inaccurate descriptions of the planets when this series was originally published in 1954. Such details as the existence of an ocean on Venus, for example, were merely speculation prior to the images sent by the Mariner II probe launched in 1962 that debunked the theory.

Onto Lucky Starr and the Big Sun of Mercury…