Barbara Kerley's previous National Geographic books include "A Cool Drink of Water" and "You and Me Together." Her book "The Dinosaurs of Waterhouse Hawkins" was a 2002 Caldecott Honor book and her acclaimed "Walt Whitman: Words for America" won an American Library Association Sibert Honor Medal for informational books. She is a former Peace Corps volunteer in Nepal, and she now lives in McKinleyville, CA.