Cover image for The Neptune challenge / Polly Holyoke.
The Neptune challenge / Polly Holyoke.

First edition.
Publication Information:
New York, New York : Disney/Hyperion, an imprint of Disney Book Group, 2015.
Physical Description:
340 pages ; 22 cm
General Note:
Sequel to: The Neptune Project.
"Nere and her friends, all genetically engineered to survive in the ocean, go on a rescue mission."-- Provided by publisher.


Call Number
Material Type
Home Location
HOL Book Junior Collection
HOL Paperback Junior Fantasy / Sci-Fi
HOL Paperback Junior Fantasy / Sci-Fi

On Order



Danger lurks beneath. . . .

Genetically engineered to survive in the ocean, Nere and her friends are recovering from their treacherous journey to Safety Harbor, an undersea refuge founded by the scientists of the Neptune Project. But plenty of enemies prowl just outside the colony's boundaries, and when two of the children are kidnapped, Nere, her loyal dolphins, and the other Neptune kids must set out on an expedition even more perilous than their first.

Tasked with infiltrating the kidnapper's high-tech undersea base, Nere soon discovers that rescuing the missing Neptune kids isn't all there is to her mission: the secret to saving the world's oceans is hidden somewhere deep inside this vast fortress, and she and her friends will have to risk everything to find it.

With bloodthirsty shark mutates and savage kids roaming the corridors, will Nere and her companions 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.

Praise for The Neptune Project 2014-2015 Texas Bluebonnet Master List Maryland Black-Eyed Susan Book Award nominee Bank Street Best Children's Books of the Year, 2014 "Holyoke keeps her prose well-pitched to her audience...this suspenseful, undersea dystopia should keep middle schoolers hooked."
-Kirkus Reviews

"The book revels in the beauty of the underwater world and the creatures that inhabit it. The relationship between the teenagers and the dolphins-who actually become characters themselves-is especially well crafted. The Neptune Project will attract male and female readers."
"[L]ots of adventure, suspense, and underwater scenes . . . [for] readers who are looking for a slightly different dystopian adventure or those who just dream of living in the ocean and playing with dolphins."
-School Library Journal

"This fast-paced science fiction adventure with well-developed characters offers a vivid and exciting oceanic setting complete with villains, dangerous sea creatures, and protective dolphin friends."
-Horn Book

Author Notes

Polly Holyoke ( ) grew up in Colorado where she spent her childhood skiing, camping, reading, and dreaming up stories. Polly went on to graduate from Middlebury College, become a middle school social studies teacher, and write The Neptune Project . She lives in Plano, Texas with her husband and their two daughters, as well as two cats, two Chihuahuas, and a Beagle.