4 TOM SWIFT and His Oceanic SubLiminator

In this 4th novel of the new TOM SWIFT Invention Adventures, the young inventor helps launch a brand new submarine only to be called in days later to rescue the crew as it sinks in the Atlantic Ocean. He not only saves the crew, he helps bring the sub back so it can be studied and repaired.

But, this doesn't end the matter. The U.S. Government knows of at least a half dozen sunken nuclear subs located around the world and every one of them is outfitted with at least one reactor and often mul...