Examines hammerhead sharks and bull sharks, comparing such aspects as their sizes, brain structure, and abilities.

Jerry Pallotta is an award-winning author of children's books, including What I Saw in the Teachers' Lounge, Dinosaur Christmas, Who Will Guide My Sleigh Tonight?, Apple Fractions, and The Hershey's Milk Chocolate Multiplication Book. His combination of interesting facts, detailed research, humor, and realistic illustrations has mesmerized countless children across the United States. You can visit him at jerrypallotta.com.
Rob Bolster is both a fine artist and a professional illustrator. His work has appeared in newspaper and magazine advertisements, and he has illustrated many books for young readers, including the bestselling Who Would Win? series. Rob lives and works near Boston, Massachusetts.