Pharrell’s “Happy” is already a Grammy-winning (and Oscar-nominated) song, and now it’s becoming a children’s book: The singer has an agreement to make four picture books with Penguin Young Readers, beginning with one titled Happy.

“I’m humbled by the global success of ‘Happy,’ but especially in awe of the song’s young fans,” Pharrell said in a statement. “My collaboration with Penguin allows me to continue a dialogue with these children in a fresh, new way. We’re both committed to feeding the curiosity of young minds with imagination.”

The first in the series, Happy, will be a photo compilation of kids around the world celebrating happiness. It’s set to arrive in stores Sept. 22.