Because there aren't tons of other children's books inspired by happiness (PLOT TWIST: there are), Pharrell has decided to take it upon himself to release a series of picture books dedicated to that very concept, obviously inspired by his massive hit single 'Happy'. A press release states that it will include photos of kids "across cultures celebrating what it means to be happy" and the first one will be out on 22 September via Putnam Books for Young Readers, with two other books to follow.