OCLC 259422052. Rights sold to Germany, Taiwan, and Indonesia. Invited Friends (2001, Woongjing Junior, Rights sold to Taiwan and Indonesia) The Secret I’m Proud of (2001, ChangBi) The Day of Hiding My Diary (2003, Woongjin Junior) The Blue Hairy Dog (2005) The Joy of Writing Children's Books (2006, Sakyejul): a book of theories on children’s book writing The Beanpole House Where Wind Stays (2010)