THE NEPTUNE CHALLENGE #2

Genetically engineered to survive in the ocean, Nere and her friends are recovering from their treacherous journey to refuge and settling in at Safety Harbor. Despite their new home's name, however, plenty of dangers still lurk just outside the compound's boundaries. When two of her friends are kidnapped, Nere and the other Neptune kids are tasked with infiltrating the kidnapper's lair, and they set out on an expedition even more perilous than their first. With bloodthirsty creatures and dangerous mutated kids roaming the ocean, there's a chance they might not make it home alive.
In the course of their rescue mission, Nere discovers that the secrets to saving the world's oceans might also be hidden in the enemy's camp. But with the odds stacked against them, will the Neptune kids find a way to save their friends, themselves, and their underwater world? The stakes couldn't be higher in this thrilling sequel to the award-winning The Neptune Project!