Chris Gall has been a certified diver for more than 20 years. He once encountered a manta ray bigger than a car, but has only seen one shark, and it happened to be asleep in an undersea cave. He is the award-winning author and illustrator of such books as Dinotrux, Substitute Creacher, Dog vs. Cat, and many others. His nonfiction books include Go For the Moon, Jumbo, and Big Rig Rescue. He lives in Tucson, Arizona.