Jupiter Series by Ben Bova

Jupiter is a boundless ocean, ten times wider than the entire planet Earth. Heated from below by the planet's seething core, it is the widest, deepest, most fearsome ocean in the solar system.Idealistic young American scientist Grant Archer joins a clandestine expedition to this awesome new world... moreJupiter is a boundless ocean, ten times wider than the entire planet Earth. Heated from below by the planet's seething core, it is the widest, deepest, most fearsome ocean in the solar system.Idealistic young American scientist Grant Archer joins a clandestine expedition to this awesome new world. But Grant does not share the ideals of the scientists he accompanies: he has been planted on their expedition by the New Morality, a religious group that wants to ferret out what the 'godless humanists' have discovered. His mission: to reassure the new religious leaders of Earth that Jupiter holds no intelligent life.But unknown to the New Morality, Grant, though the son of a minister, is both a believer and a man who sees no reason why science and faith can not co-exist. He has come to the vast, planet-girdling ocean of Jupiter with an open mind, and he is about to tell his masters something that may shatter their conviction. less

In Ben Bova's novel JUPITER, physicist Grant Archer led an expedition into Jupiter's hostile planetwide ocean, attempting to study the unusual and massive creatures that call the planet their home. Unprepared for the hostile environment and crushing pressures, Grant's team faced certain death as their ship malfunctioned and slowly sank to the planet's depths. However one of Jupiter's native creatures--a city-sized leviathan--saved the doomed ship... moreIn Ben Bova's novel JUPITER, physicist Grant Archer led an expedition into Jupiter's hostile planetwide ocean, attempting to study the unusual and massive creatures that call the planet their home. Unprepared for the hostile environment and crushing pressures, Grant's team faced certain death as their ship malfunctioned and slowly sank to the planet's depths. However one of Jupiter's native creatures--a city-sized leviathan--saved the doomed ship. This creature's act convinced Grant that the huge creatures were intelligent, but he lacked scientific proof. Now, several years later, Grant prepares a new expedition to prove once and for all that the huge creatures are intelligent. The new team faces dangers from both the hostile environment and from humans who will do anything to make sure the mission is a failure, even if it means murdering the entire crew. One of "Library Journal"'s Best SF/Fantasy Books of 2011 less