(English) The illustrator Heo Gu studied fine arts at college. He worked in the advertisement and public relations areas before he began to draw unique and humorous pictures for children’s books. He has illustrated many children’s books such as Willow Warbler and Pine Tree, What Is the Temperature of My Heart?, The First Certificate of Award That I Have Ever Received, Mimi’s Diary, Manghil’s Spring, Uncle Younggu, Golden Toad’s First Class, Siwoo’s Face Turned Red, I Would Like to Become a Fox, Dr. Saury Pike, Please Help!, Foolish Mr. Doodeok and the King of Bandit, A Talking Black Pebble, and A Mustard Seed’s Dream.