Yangsook Choi grew up in Seoul, Korea. She has written and illustrated several books for young readers, including The Sun Girl and the Moon Boy and Good-bye, 382 Shin Dang Dong by Frances Park and Ginger Park. The first book she illustrated, Nim and the War Effort by Milly Lee, was an ALA Notable Book and an IRA-CBC Children's Book Award Winner.
Unhei's reflection and inner strength are noteworthy; cultural details freshen the story, and Choi's gleaming, expressive paintings are always a treasure. -The New York Times