Paul McCartney is getting into the world of children's books.
He's created a book called Hey Grandude! with illustrator Kathryn Durst. The book's title and inspiration came from a nickname McCartney got from one of his grandchildren.
McCartney says the title character "represents grandfathers everywhere. He has four grandchildren and he calls them 'Chillers.' They love him and they go on adventures with him and he’s kind of magical.” Hey Grandude will be published September 5th, 2019.