LONDON -- Publishers have released the cover of the J.K. Rowling novel set for worldwide release in September.

"The Casual Vacancy" will be the Harry Potter author's first offering aimed primarily at adults.

The novel is set in the fictional English town of Pagford and deals with the unexplained death of a village resident.

The cover released Tuesday is mostly red with a yellow border, and shows what looks like an "X" marking a box.

Little, Brown Book Group says film and stage actor Tom Hollander will record the audio version of the book.

Rowling's series about Potter, the boy wizard, made her one of the most successful authors in the world.