The Neptune Challenge

Genetically engineered to survive in the ocean, Nere and her companions are recovering from their long, treacherous journey to refuge and settling in at Safety Harbor. Despite its name, plenty of dangers still lurk just outside the colony's boundaries. Soon Nere and her loyal dolphins must set out on a mission even more perilous than their first: infiltrate an undersea fortress to save their kidnapped friends and steal away a vital scientific secret that may save the world and its oceans. Fighting terrifying mutated creatures and teens, will the Neptune kids find a way to save their companions, themselves, and their underwater world? The stakes couldn't be higher in this thrilling sequel to the award-winning The Neptune Project.