Novum: Genesis - Novum, #1

An undersea world on the edge of extinction!As the last descendants of Earth struggle to survive beneath the surface of an alien ocean, one man's discovery will lead him on a journey of redemption, while he fights to save what's left of his world. Jacob Stone is a young man haunted by his past. When he reluctantly takes a job to help pay for a transport submarine he inherited but doesn't want, he uncovers an ancient weapon so powerful it could alter the course of humanity.
In the end, a selfless act of defiance teaches him the importance of trust in an undersea world on the edge of extinction.