As author and illustrator
Busy Buddies: Silly Stuff That Goes Together (2006, Candlewick Press, ISBN 978-0-7636-2776-8)
Food Friends: Fun Foods That Go Together (2006, Candlewick Press, ISBN 978-0-7636-2777-5)
Bee-Wigged (2008, Candlewick Press, ISBN 978-0-7636-3614-2)
Itty Bitty (2009, Candlewick Press, ISBN 978-0-7636-3616-6)
El Deafo (2014, Harry N. Abrams, ISBN 978-1-4197-1020-9)
I Yam a Donkey! (2015, Clarion Books, ISBN 978-0-5440-8720-0)
Chuck and Woodchuck (2016, Candlewick Press, ISBN 978-0-7636-7524-0)
You Loves Ewe! (2019, Clarion Books, ISBN 978-1-3285-2611-3)
Animal Albums from A to Z (2024, Candlewick Press, ISBN 978-1-5362-2624-9)
Sock Monkey Goes To Hollywood: A Star Is Bathed (2003, Candlewick Press, ISBN 978-0-7445-9850-6)
Sock Monkey Boogie Woogie: A Friend Is Made (2004, Candlewick Press, ISBN 978-0-7636-2392-0)
Sock Monkey Rides Again (2006, Candlewick Press, ISBN 978-0-7636-3089-8)
The Sleepover (2012, Candlewick Press, ISBN 978-0-7636-7935-4)
Rabbit and Robot and Ribbit (2016, Candlewick Press, ISBN 978-0-7636-7935-4)
Inspector Flytrap with Tom Angleberger (2016, Amulet Books, ISBN 978-1-4197-0948-7)
Inspector Flytrap in The President’s Mane Is Missing with Tom Angleberger (2016, Harry N. Abrams, ISBN 978-1-4197-0955-5)
Inspector Flytrap in The Goat Who Chewed Too Much with Tom Angleberger (2017, Harry N. Abrams, ISBN 978-1-4197-0956-2)
Smell My Foot! (2019, Candlewick Press, ISBN 978-0-7636-7936-1)
Egg or Eyeball? (2020, Candlewick Press, ISBN 978-1-5362-0439-1)
