It may not be as magical as Harry Potter, but J.K. Rowling is excited about The Casual Vacancy, her first novel for grown-ups. Little, Brown & Co. announced the book's title Thursday with a brief teaser of the "blackly comic, thought-provoking and constantly surprising" story, which takes place in an idyllic English town called Pagford that loses its charm when a parish council election tears the community apart." The book will be available worldwide on Sept. 27, Rowling's publisher said, in both e-book and traditional hardcover formats.