Pendred Noyce is a physician, an educator, and the author of The Baffling Case of the Battered Brain and The Desperate Case of the Diamond Chip. She is also the author of the award-winning middle-grade Lexicon Adventure Series. She lives in Boston, Massachusetts. Roberta Baxter is the author of several books, including The Bill of Rights, The Dropping of the Atomic Bombs, The Magna Carta, and Moving with Children: A Guide to a Smooth Family Relocation. She lives in Colorado Springs, Colorado.