Sandra Markle Sandra Markle is the author of more than 200 books for children, such as A Mother's Journey (Charlesbridge, 2006), How Many Baby Pandas (Walker, 2009), The Case of the Vanishing Golden Frogs (Millbrook, 2011), and Butterfly Tree (Peachtree Publishing, 2011). She has won numerous awards for this work, including Boston Globe-Horn Book Honor Book, Cooperative Children's Book Center Choices, NSTA Outstanding Science Trade Book, SB&F finalist, John Burroughs List of Nature Books for Young Readers, Junior Library Guild Selection, Orbis Pictus Recommended Book, Charlotte Zolotow Award, and MORE. She was honored with the title of "Best of Children's Non-Fiction" Georgia Author of the Year award five times and was named one of 1999's Women of the Year by Women in Technology International for her contributions to science and technology.

In addition to her books, Sandra Markle has developed science specials for CNN and PBS and Internet-based science education programs for Scholastic and National Science Foundation. She was selected twice by NSF to travel to Antarctica with the Artists & Writers Program and provided some of the first live chats with schools from this remote location. She lives in Sarasota, Florida with her husband, photographer, Skip Jeffery.

Howard McWilliam left his career as a U.K. financial magazine editor and journalist in 2005 to concentrate on illustrating. He is cover artist for The Week in the U.S. and U.K. and has illustrated dozens of children's novels, puzzles, and picture books, including the bestselling I Need My Monster. He lives in Cheltenham, England, with his wife, Rebecca, and three children.