Brenda Z. Guiberson is the author of many books for children, including The Greatest Dinosaur Ever, Frog Song; Life in the Boreal Forest; Moon Bear; The Emperor Lays an Egg; and the bestselling Cactus Hotel. She lives near Seattle, Washington.
Gennady Spirin is the illustrator of Frog Song and Life in the Boreal Forest. He has been awarded five gold medals from the Society of Illustrators, the first prize in both the Bologna and Barcelona International Book Fairs, and has been chosen four times for the New York Times Best Illustrated Books list. He lives in Princeton, New Jersey.