From childhood, when she read a lot of books, Lee Hyeon-jeong dreamed of becoming an illustration artist, and now that she is grown, she happily creates illustrations. She has illustrated Mom, Are You as Sorry as I Am?, Mudflat, I Am Sorry, Dangerous but Marvelous Topography Story, Take Care of the Puppy, Uncle Kungta Is a Trouble Shooter, Ongojip and Ongojip and Ongjini, Daddy's Whisper, and Potpourri.