Bonnie Worth is a published author of children's books. It is one of the pen names of Kate Klimo, who was also Vice President and Publisher of Random House Children's Books. Her titles include One Cent, Two Cents, Old Cent, New Cent: All About Money (Cat in the Hat's Learning Libry), Bear in Air (Pooh Adorables), Who Cares? Pooh Cares! In 2014 her title, Oh, Say Can You Say Di-No-Saur? made the New York Times Best Seller List. Her most recent book is Hark! a Shark!: All about Sharks.