Jack and his genius siblings, Ava and Matt, embark on an adventure with Dr. Hank Witherspoon to the remote Hawaiian island home of Ashley Hawking, a technology billionaire. Hawking and engineer Rosa Morris have built a revolutionary electricity plant that harvests energy from the ocean's depths, but someone has sabotaged the project. In his search for the culprit, Jack ventures 2,000 feet below the surface of the ocean in a homemade submarine. He, Ava, and Matt attend the world's strangest birthday party, face off against an arrogant young genius, and then find themselves lost at sea. The three siblings have to use all their brainpower and cunning to find out who's behind the sabotage . . . and survive. In the Jack and the Geniuses series, readers join Jack, Ava and Matt on adventures around the world to tackle some of science's biggest challenges, including new ways to create clean drinking water, to generate clean and renewable energy, and to extend information access to the entire planet. Each book in the series includes cool facts about the real-life science found in the story and a fun DIY project.