Lillian R. Lieber was Professor and Head of the Department of Mathematics at Long Island University. She wrote a series of light-hearted (and well-respected) math books, many of them illustrated by her husband. Hugh Gray Lieber was Professor and Head of the Department of Fine Arts at Long Island University. Barry Mazur does his mathematics at Harvard University and lives in Cambridge, Massachussetts, with the writer Grace Dane Mazur. He is the author of Imagining Numbers (Particularly the Square Root of Minus Fifteen) (FSG, 2003). He has won numerous prizes in his field, including the Veblen Prize, Cole Prize, Steele Prize, and Chauvenet Prize.