Swimming with Sharks

In this science fiction thriller, the teen son of a human Navy Commander and an alien ambassador wants to help his mother's race settle in Earth's oceans before the core to her home planet implodes. When he stumbles upon a human conspiracy to use alien technology in an act of terrorism, which will turn public opinion against his mother's race, he must act fast to find a way to stop the terrorist attack which he knows will do far more than set Earthlings against Risonians--it will destroy Earth's core.