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For Your Every Summer RSVP, with Code: SUMMER15
Description
In the Deep Blue SeaJack and his siblings hit the high seas to solve the mystery of a sabotaged renewable energy project in another thrilling adventure in this New York Times bestselling series from Bill Nye and Gregory Mone! 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
Jack and his siblings hit the high seas to solve the mystery of a sabotaged renewable energy project in another thrilling adventure in this New York Times bestselling series from Bill Nye and Gregory Mone!
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.
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.
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4.3 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 1
Cut too small - Shrinkage!
Size: 3X-Large, Color: Chill
This Costa Del Mar shirt is cut way too small and then shrinks from there. Could not wear after one wash. I’m 6’4” @ 215 and normally wear XL or sometimes XXL. This XXL was really too small from the jump and then shrunk down so much I can’t even wear it. If you just have to get it, I’d order 2 sizes up. Not the quality I’m accustomed to in Costa products.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Perfect Fit!
Size: Medium, Color: Dark Heather, Size: Medium, Color: Dark Heather
My daughter got the Costa T-shirt for her boyfriend, and he absolutely loves it! The fabric is super soft, lightweight, and breathable—perfect for everyday wear or a day out on the water. The fit is just right, and the design looks even better in person. Great quality and a solid pick for any Costa fan!
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Reviewed in the United States on June 30, 2025
★★★★★ 5
Nice shirt at a good price
Size: Small, Color: Indigo
Nice shirt, fits well and is a nice color and button layout. It was a good deal.
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Love it
Size: Large, Color: Indigo
Good quality
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Reviewed in the United States on May 20, 2026
★★★★★ 3
Its OK but wrinkles easily.
Size: X-Large, Color: Light Khaki Brown
Decent shirt and fits well, but wrinkle city! I could barely iron them out after washing.
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Reviewed in the United States on May 25, 2026
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