Hyewon Yum is the author and illustrator of many picture books, including Lion Needs A Haircut and Grandpa Across the Ocean. Her book Saturday is Swimming Day was named a Charlotte Zolotow Award Honor and Mom, It's My First Day of Kindergarten! received the Ezra Jack Keats New Illustrator Award. Hyewon was born and grew up in Seoul, Korea. Now she lives in Brooklyn, New York, with her family.