Penny Warner's first book in the Code Busters Club series, The Secret of the Skeleton Key, was nominated for the Agatha Award for Best Children's/Young Adult novel, and the follow-up, The Haunted Lighthouse, won the award the next year. She has also won both the Agatha Award and Anthony Award for her novel The Mystery of the Haunted Caves. Her books have received excellent reviews and have been printed in fourteen countries throughout the world. Warner lives in Danville, California. You may visit her online at www.pennywarner.com, and brush up on your sleuthing skills at www.CodeBustersClub.com. The author lives in Danville, California.