Gregory E. Lang is the New York Times bestselling author of more than 20 books, including Why a Daughter Needs a Dad, Why a Daughter Needs a Mom, Why a Son Needs a Dad, Why a Son Needs a Mom, and Why I Love You. He lives in Georgia. Susanna Leonard Hill is the New York Times bestselling author of Moon's First Friends, as well as many other award-winning books for children. She does frequent school and library visits, teaches picture book writing, and offers picture book critiques. She lives in New York's Mid-Hudson Valley with her children and two rescue dogs.