Author & Illustrator

Mo Willems


Mo Willems knows a Good Idea when he sees one. A three-time Caldecott Honor winner (for Don’t Let the Pigeon Drive the Bus!, Knuffle Bunny, and Knuffle Bunny Too), he also won two Geisel Medals and two Geisel Honors for his Elephant and Piggie books. His books are perennial New York Times bestsellers, including Knuffle Bunny Free, Hooray for Amanda & Her Alligator!, and the Cat the Cat series. Before he turned to making picture books, Mo was a writer and animator on Sesame Street, where he won six Emmys. Mo lives with his family in Massachusetts.

Opposites Abstract
Guess What!?
I'm on It!
What about Worms!?
Time to Pee!
Who is the Mystery Reader? (Unlimited Squirrels)
Elephant & Piggie Biggie-Biggie!
The Pigeon HAS to Go to School!
Harold & Hog Pretend For Real!

Most Popular Mo Willems Books

    Waiting Is Not Easy!
    Mo Willems
    Elephant & Piggie Biggie!
    Mo Willems
    Elephant & Piggie Biggie-Biggie!
    Mo Willems
    Don't Let the Pigeon Drive the Bus!
    Mo Willems
    The Pigeon HAS to Go to School!
    Mo Willems
    The Pigeon Needs a Bath!
    Mo Willems

Book Stats


All Mo Willems Books

2021Opposites AbstractMo Willems24
2021Guess What!?Mo WillemsMo Willems96
2021I'm on It!Andrea Tsurumi, Mo Willems64
2020What about Worms!?Ryan T. Higgins, Mo Willems64
2020Time to Pee!Mo Willems38
2019Who is the Mystery Reader? (Unlimited Squirrels)Mo WillemsMo Willems96
2019Elephant & Piggie Biggie-Biggie!Mo Willems320
2019The Pigeon HAS to Go to School!Mo WillemsMo Willems40
2019Harold & Hog Pretend For Real!Mo Willems, Dan SantatMo WillemsDan Santat64
2019A Busy Creature's Day EatingMo WillemsMo Willems24
2019BecauseMo WillemsMo Willems40
2018I Lost My Tooth!Mo WillemsMo Willems96
2018The Itchy Book!Mo Willems, LeUyen PhamMo WillemsLeUyen Pham64
2017It's Shoe Time!Mo Willems, Bryan CollierMo WillemsBryan Collier64
2017Welcome: A Mo Willems Guide for New ArrivalsMo WillemsMo Willems32
2017The Good for Nothing Button!Mo Willems, Charise Mericle HarperMo WillemsCharise Mericle Harper64
2017Elephant & Piggie Like Reading! The Good for Nothing ButtonMo WillemsCharise Mericle Harper64
2017Elephant & Piggie Biggie!Mo WillemsMo Willems320
2016Nanette's BaguetteMo WillemsMo Willems40
2016The Cookie FiascoMo Willems, Dan SantatMo WillemsDan Santat64
2016We Are Growing!Mo Willems, Laurie KellerMo WillemsLaurie Keller64
2016The Thank You BookMo WillemsMo Willems64
2015I Really Like Slop!Mo WillemsMo Willems64
2015Story of Diva and FleaMo WillemsTony DiTerlizzi80
2015I Will Take A Nap!Mo WillemsMo Willems64
2014Waiting Is Not Easy!Mo WillemsMo Willems64
2014My New Friend Is So Fun!Mo WillemsMo Willems64
2014The Pigeon Needs a Bath!Mo WillemsMo Willems40
2013I'm a Frog!Mo WillemsMo Willems64
2013A Big Guy Took My Ball!Mo WillemsMo Willems64
2013That Is Not a Good Idea!Mo WillemsMo Willems48
2012Let's Go for a Drive!Mo WillemsMo Willems64
2012Goldilocks and the Three DinosaursMo WillemsMo Willems40
2012The Duckling Gets a Cookie!?Mo WillemsMo Willems40
2012Listen to My Trumpet!Mo WillemsMo Willems64
2011Should I Share My Ice Cream?Mo WillemsMo Willems57
2011Happy Pig Day!Mo WillemsMo Willems64
2011Hooray for Amanda & Her Alligator!Mo WillemsMo Willems72
2011¡No Dejes Que La Paloma Conduzca El Autobus!Mo WillemsMo Willems40
2011I Broke My Trunk!Mo WillemsMo Willems64
2010Knuffle Bunny Free: An Unexpected DiversionMo WillemsMo Willems52
2010We Are in a Book!Mo WillemsMo Willems64
2010We Are in a Book! (An Elephant and Piggie Book)Mo WillemsMo Willems64
2010City Dog, Country FrogMo WillemsJon J Muth64
2010Can I Play Too?Mo WillemsMo Willems64
2010Cat the Cat, Who Is That?Mo WillemsMo Willems32
2010I Am Going!Mo WillemsMo Willems64
2009Pigs Make Me Sneeze!Mo WillemsMo Willems64
2009Elephants Cannot Dance!Mo WillemsMo Willems64
2009Pigeon Wants a Puppy!Mo Willems33
2009Watch Me Throw the Ball!Mo WillemsMo Willems64
2008Are You Ready to Play Outside?Mo WillemsMo Willems64
2008I Love My New Toy!Mo WillemsMo Willems64
2008I Love My New Toy! (An Elephant and Piggie Book)Mo WillemsMo Willems64
2008I Will Surprise My Friend!Mo WillemsMo Willems64
2007Knuffle Bunny Too: A Case of Mistaken IdentityMo WillemsMo Willems48
2007There is a Bird on Your Head!Mo WillemsMo Willems64
2007I Am Invited to a Party!Mo WillemsMo Willems64
2007My Friend is SadMo WillemsMo Willems64
2007My Friend is Sad (An Elephant and Piggie Book)Mo WillemsMo Willems57
2007Today I Will Fly!Mo WillemsMo Willems64
2006Edwina, the Dinosaur Who Didn't Know She Was ExtinctMo WillemsMo Willems40
2006Don't Let the Pigeon Stay Up Late!Mo WillemsMo Willems40
2005Leonardo, the Terrible MonsterMo WillemsMo Willems48
2005Pigeon Loves Things That Go!Mo WillemsMo Willems12
2005The Pigeon Has Feelings, Too!Mo WillemsMo Willems12
2004Knuffle BunnyMo WillemsMo Willems36
2004The Pigeon Finds a Hot Dog!Mo WillemsMo Willems40
2003Don't Let the Pigeon Drive the Bus!Mo WillemsMo Willems40


Ryan T. Higgins
Andrea Tsurumi
Laurie Keller
Dan Santat
Tony DiTerlizzi
Jon J Muth
LeUyen Pham
Bryan Collier
Charise Mericle Harper

Book Dedications by Mo Willems

  • To Tyler Nevins and Tracey Keevan
    Elephant & Piggie Biggie!
  • to Cher, who always makes a splash
    The Pigeon Needs a Bath!
  • This book is dedicated to the real Trixie and her mommy. Special thanks to Anne and Alessandra; Noah, Megan, and Edward; the 358 6th Avenue Laundromat; and my neighbors in Park Slope, Brooklyn.
    Knuffle Bunny
  • To Trixie Willems- for showing me what it's all about.
    Nanette's Baguette
  • For the seasons, and all things that change
    City Dog, Country Frog