A MISSING RELATIVE...
Something of value was buried beneath the underwater dome city of Marinia... something that had already cost one man's life, caused another man's kidnapping and gravely affected still another man's future.
Expelled from the Sub-Sea Academy on trumped-up charges, Jim Eden wasn't about to wait around to prove his innocence. As soon as he learned that his uncle mysteriously disappeared while mining uranium at the bottom of hazardous Eden Deep, Jim knew what he had to do... and that he had to do it fast.
So he headed for the vast dome city - location of the great mining colony at the bottom of the sea - to pick up any clues to his uncle's disappearance. But once he had entered the undersea metropolis, the wrong people had his number... and they were determined that Jim would sink forever without a trace.
Frederik George Pohl, Jr. (1919-2013) was an American science fiction writer, editor and fan, with a career spanning over seventy years. From about 1959 until 1969, Pohl edited Galaxy magazine and its sister magazine If, winning the Hugo for if three years in a row. His writing also won him three Hugos and multiple Nebula Awards. He became a Nebula Grand Master in 1993.
Frederik Pohl used these pseudonyms: Edson McCann, Jordan Park, Elton V. Andrews, Paul Fleur, Lee Gregor, Warren F. Howard, Scott Mariner, Ernst Mason, James McCreigh, Dirk Wilson, Donald Stacy and James MacCreigh.
Frederik Pohl. Wikipedia.