As a little girl gets ready for bed each night, she doesn't realize a lot of her activities are being mirrored by her favorite heroine, Supergirl, but they will both turn sleepless nights into sweet dreams.

Michael Dahl is the prolific author of the bestselling Goodnight, Baseball picture book and more than 200 other books for children and young adults. He has won the Association of Educational Publishers Distinguished Achievement Award three times for his nonfiction, a Teachers' Choice Award from Learning Magazine, and a Seal of Excellence from the Creative Child Awards. Dahl currently lives in Minnesota.