Lee Ho-baek

While We Were Out (2000) was translated into seven languages. The New York Times selected it as one of the Best Illustrated Books of 2003,^[1] and International Board on Books for Young People awarded it the 2012 Peter Pan Prize.^[2]

Bee-bim Bop! was published in the U.S. with text by Linda Sue Park and accompanied by Lee's illustrations.

• The Strongest Rooster in the World (in Korean). Jamamjoo. 1997. ISBN 9788986565041.
• While We Were Out. Kane/Miller Book Publishers. 2003. ISBN 9781929132447.^[3][4][5][6]
• Bunny Run
• My Hangul Friends

• Park, Linda Sue (2005). Bee-bim Bop!. Clarion Books. ISBN 9780618265114.^[7][8][9]

• 2023 special exhibition featuring Éditions MeMo of France, "Picture Books, Art of Yesterday and Today" (Suncheon Picture Book Library)
• 2015 Special immersive exhibition aimed at children, "Lee Ungno's Gestures of Peace: From 1 to 10,000" (Lee Ungno Museum) - Ministry of Culture, Sports and Tourism^{[dead link]}