Goodnight Moon
by Margaret Wise Brown

Goodnight Moon is a children's book written by Margaret Wise Brown and illustrated by Clement Hurd. It was first published in 1947, and is a highly acclaimed example of a bedtime story. The content depicts the process of a little one saying goodnight to everything around: "Goodnight room. Goodnight moon. Goodnight cow jumping over the moon. Goodnight light, and the red balloon..."

Goodnight Moon is considered a classic in children's literature. The book is a poem, written in a simple rhyme form. It contains illustrations of many objects familiar to a child, including a recurring mouse. Part of the activity of reading this book is identifying these objects in the illustrations. As the book progresses, the room depicted gets continuously darker, the moon rises higher in the sky, and the time on the clock gets later.