Books in Order: Knock Knock Greeting Cards by Mo Willems Workshop

About the Author

Mo Willems is a number-one New York Times bestselling author and illustrator who has been awarded three Caldecott Honors, two Theodor Seuss Geisel Medals, and five Geisel Honors. His debut book, Don’t Let the Pigeon Drive the Bus!, was inducted into the Picture Book Hall of Fame. Mo began his career as a writer & animator on Sesame Street, where he garnered six Emmy Awards.

Hidden Pigeon Company (“HPC”) is a kids and family content company expanding the reach and impact of Mo Willems’ bestselling catalog of children’s books and intellectual property across all entertainment platforms, including television, film, digital, gaming, live events, location-based experiences, publishing, consumer products, and more. 

Knock Knock Kids is a whimsical, rambunctious line of paper goods, books, and stuff for children (AKA young humans who haven’t lost the pixie dust we’re all born with). We make fun things to help kids express their feelings, build confidence, unleash their creativity, and laugh themselves silly. Like really, really silly.

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