From early childhood, Lee Yeasook liked to draw pictures and make things with her hands. Lee majored in Oriental Painting at university. She would like to make the worlds that children meet in the books more fantastic and meaningful through pictures. Books illustrated by Lee Yeasook include The Pizza Election, The Veterinarian with Curly Hair Has No Time To Lose!, I Am Very Nice, and 100 Idiomatic Phrases in Textbooks for Better Understanding.