Where the Wild Things Are is a 1963 children's picture book written and illustrated by American writer and illustrator Maurice Sendak, originally published in hardcover by Harper & Row. The book has been adapted into other media several times, including an animated short film in 1973 ; a 1980 opera; and a live-action 2009 feature-film adaptation. The book had sold over 19 million copies worldwide as of 2009, with 10 million of those being in the United States.

A picture book combines visual and verbal narratives in a book format, most often aimed at young children. With the narrative told primarily through text, they are distinct from comics, which do so primarily through sequential images.