Happy, the Book Series For Kids

Pharrell's doing something good for children!

Singer, songwriter, record producer, fashion designer, TV star on The Voice, and now....Pharrell Williams: author.

Pharrell has signed a deal with Putnam Books for a series of children's picture books.

The first "Happy" book will be out Sept. 22nd and will feature photos of kids around the world showing what happiness means to them.

There will be four books altogether.