Sally M. Walker is the author of many award-winning nonfiction books for young readers. She is the author of Secrets of a Civil War Submarine: Solving the Mysteries of the H.L. Hunley, which won the prestigious Sibert award in 2006. When she isn't busy writing or doing research for books, Ms. Walker works as a children's literature consultant. She gives presentations at many reading conferences and has taught at Northern Illinois University. Her other books with Lerner include Magnetism, Light, Sound, and Electricity.