Laura Numeroff is the New York Times bestselling author of If You Give a Mouse a Cookie and What Mommies Do Best/What Daddies Do Best. The youngest of three sisters, Laura lives in Los Angeles, California. Lynn Munsinger has illustrated dozens of children's books, including Spot the Plot by J. Patrick Lewis and What Mommies Do Best/What Daddies Do Best by Laura Numeroff. She spends winters in Vermont and the snowless seasons in Connecticut. Gender: unisex.