Kathleen Duey has written more than forty books for children. The Unicorn's Secret is based on a dream she had when she was at school. She lives in southern California.

Karen A. Bale grew up in southern California and graduated from the University California Riverside. She has written seventeen historical romances, including the successful seven-book Sweet Medicine’s Prophecy series. She has done freelance work for several years, including helping to write two nonfiction books. Karen still resides in southern California, ten miles from the Pacific Ocean.