Catherine Chambers 
Stickmen’s Guide to Oceans in Layers [PDF ebook] 

Splash with the Stickmen at the sea’s surface, and then dive down through the darkening zones and into the abyss. But don’t stop there! Follow the Stickmen to snorkel around coral gardens, find creatures that make their own light, and dive 7 miles down to the deepest trench. The Stickmen have plenty of oxygen (and wild facts) to keep you alert as you float past coral gardens, pods of humpback whales, robotic submarines, and the weirdest creatures of the deep.