Jill Esbaum is the award-winning author of many picture books, including I Am Cow, Hear Me Moo! and I Hatched! (both Penguin). She also enjoys writing a variety of nonfiction books for National Geographic Kids, including the popular Angry Birds Playground series. Jill has also written many popular Sterling titles, including Frankenbunny, Teeny Tiny Toady, Elwood Bigfoot, and If a T. Rex Crashes Your Birthday Party. Jill lives in Dixon, IA.