Kate McMullan taught elementary school in inner-city Los Angeles and on an American Air Force base in Germany. After earning a Master's Degree in Early Childhood Education, she decided to try her hand at writing. She also writes under the names K.H. McMullan and Katy Hall and has more than fifty children's books to her credit, including her bestselling picture book collaborations with her husband Jim. She lives in New York, New York. Tao Nyeu is the creator of Wonder Bear , which won the Founder's Award from the Society of Illustrators and a Marion Vannett Ridgway Award Hon∨ and Bunny Days , which won the Ezra Jack Keats Award and a Golden Kite Award Honor. Tao was born in Ohio and grew up in New York.

She earned a BFA from Cornell University and an MFA from the School of Visual Arts. She now lives in Southern California with her children.