Amy Krouse Rosenthal is the author of Little Pea, Little Hoot, Little Oink, Duck! Rabbit!, Wumbers, and the upcoming Worldes. She lives in Chicago, Illinois.Learn about her online at Whoisamy.wordpress.com.Tom Lichtenheld has illustrated several books with Amy Krouse Rosenthal, including The OK Book, It's Not Fair!, Duck! Rabbit!, and Wumbers. He is also the illustrator of Shark Vs. Train; Goodnight, Goodnight Construction Sit; E-mergency!, and quite a few other titles. He lives in Geneva, Illinois.You can see all of Toms books and more at Tomlichtenheld.com.