books.google.com - Illustrations and simple text depict the sleeping habits of animals and humans....https://books.google.com/books/about/Dark_night_sleepy_night.html?id=A5VydGVYSeUC&utm_source=gb-gplus-shareDark night, sleepy night
Harriet Ziefert has written many children's books for HarperCollins including "What's A Vacation?" and "When Will Santa Come, " both illustrated by Claire Schumacher, the Bear Boar Books, illustrated by Susan Baum, and "Scooter's Christmas, " illustrated by Rick Brown. Ms. Ziefert lives in New Jersey and Massachusetts. Simms Taback has collaborated with Harriet Ziefert on many HarperCollins children's books. Some of their titles include "Noisy Barn!, Zoo Parade!, " and the sticker book readers, "On Our Way to the Forest" and "On Our Way to the Water." Mr. Taback lives in New York City.