Sy Montgomery writes award winning books for children and adults. Her book Kakapo Rescue: Saving the World's Strangest Parrot was awarded the 2011 Sibert Medal. She lives in Hancock, NH.

Keith Ellenbogen specializes in underwater photography and videography, documenting marine life to showcase the beauty of nature, inspire social change, and protection of the natural world. He lives in Brooklyn, New York.

With three hearts and blue blood, its gelatinous body unconstrained by jointed limbs or gravity, the octopus seems to be an alien, an inhabitant of another world. It's baggy, boneless body sprouts eight arms covered with thousands of suckerssuckers that can taste as well as feel. The octopus also has the powers of a superhero: it can shape-shift, change color, squirt ink, pour itself through the tiniest of openings, or jet away through the sea faster than a swimmer can follow. But most intriguing of all, octopusesclassed as mollusks, like clamsare remarkably intelligent with quirky personalities. This book, an inquiry into the mind of an intelligent invertebrate, is also a foray into our own unexplored planet. These thinking, feeling creatures can help readers experience and understand our world (and perhaps even life itself) in a new way.