* The Very Busy Spider
* Brown Bear, Brown Bear, What Do You See?
* The Grouchy Ladybug
* Papa, Please Get the Moon for Me
* 1, 2, 3 to the Zoo
* A House for Hermit Crab
* Do You Want to Be My Friend?
* From Head to Toe
* The Very Lonely Firefly
* The Secret Birthday Message
* The Very Busy Day
His books are known for their vibrant colors, simple language, and engaging storylines. They have been translated into over 60 languages and have sold millions of copies worldwide.