Pharrell's Grammy-winning single "Happy" started out as a song from a children's movie, and now it's coming full circle by becoming a children's book. Today (Feb. 17), publisher Putnam Books for Young Readers announced that it has signed up hem from his smash hit.

As Billboard reports (via The Associated Press), Pharrell is set to pen a positive mood book based on his hit "Happy." The untitled book will be picture heavy, featuring images of children around the world "celebrating what it means to be happy."

So, we can just imagine them clapping their hands, acting like rooms without roofs and knowing that happiness is the truth.

Pharrell's first dive into the world of children's books will be released on Sept. 22.

The book deal is just the latest success for Pharrell and "Happy." The song topped the Billboard Hot 100 for 10 weeks last year and was the No. 1 song of 2014. "Happy" also won two Grammys earlier this month, for Best Music Video and Best Pop Solo Performance.

Pharrell is not the first musician to pen a series of children's books. He joins the likes of Madonna, Paul McCartney and The Decemberists' Colin Meloy, all of whom have ventured into the world of published. "Happy" also isn't the only recent hit to get its message turned into a novelization. The 2013 viral hit "The Fox" by Ylvis also has a children's book version.

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