Mo Willems (www.pigeonpresents.com), a New York Times #1best-selling author and illustrator, has been awarded a Caldecott Honor on three occasions, for Don't Let the Pigeon Drive the Bus! , Knuffle Bunny- A Cautionary Tale , and Knuffle Bunny Too- A Case of Mistaken Identity . The celebrated Elephant & Piggie early-reader series has been awarded the Theodor Seuss Geisel Medal on two occasions (for There Is a Bird on Your Head! and Are You Ready to Play Outside? ) as well as garnering five Geisel Honors (for We Are in a Book!, I Broke My Trunk!, Let ' s Go for a Drive!, A Big Guy Took My Ball! and Waiting Is Not Easy! ).