Pharrell has a “Happy” deal for a series of children’s picture books. The Grammy Award-winning performer has an agreement with Putnam Books for Young Readers for Four Picture Books, starting with one inspired by his hit song. Putnam announced Tuesday that the book, “Happy,” will be published Sept. 22 and will feature photographs of children from around the world “celebrating what it means to be happy.” It plans a first printing of 250,000 copies. Pharrell has won 10 Grammys, including two for “Happy.” “Happy” was featured on the soundtrack of Despicable Me 2 and was an Oscar nominee last year for best song.