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. She is also noted for developing On-Line Expedition: Antarctica, one of the first on-line educational programs and continued adding further on-line reports from Antarctica while working on book projects in 1996 and 1999 as a grantee for the National Science Foundation's Artists and Writers Program. Sandra lives in Florida with her husband, photographer, Skip Jeffery.

Howard McWilliam is the illustrator of I Need My Monster, by Amanda Noll, and When A Dragon Moves In, by Jodi Moore. Howard left his career as a U.K. magazine editor and journalist in 2005 to concentrate on his growing career as a cartoonist and illustrator. He has won various awards and competitions for his work and has been published in a wide range of U.K. magazines and newspapers, including The Daily Telegraph and The Week. He lives in Kingston Upon Thames, England, with his wife, Rebecca.