In this story inspired by Jules Verne's "20,000 Leagues Under the Sea," Ana Dakkar, a freshman at Harding-Pencroft Academy, a five-year high school that graduates the best marine scientists, naval warriors, navigators, and underwater explorers in the world, makes astounding discoveries about her heritage and puts her leadership skills to the test against deadly enemies from a rival school.

When the Great Depression takes almost everything they own, Ellie's family is forced to leave their home in town and start over in the untamed forests of nearby Echo Mountain. Ellie has found a welcome freedom, and a love of the natural world, in her new life on the mountain. But there is little joy, even for Ellie, as her family struggles with the aftermath of an accident that has left her father in a coma. An accident unfairly blamed on Ellie. Determined...

Piggy is back, and his newest plot is his most diabolical yet. Dog Man and the rest of your favorite characters must join together. What new villains are on the horizon? Where are they all coming from? And who will step forward to save the city when scoundrels sabotage our Supa Buddies?