J.K. Rowling's "The Casual Vacancy" book cover revealed

The cover of J.K. Rowling's "The Casual Vacancy."

/ AP/Little, Brown Book Group

(CBS/AP) LONDON - Publishers have released the cover of the J.K. Rowling novel set for worldwide release in September, along with new details of what the book will be about.

"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. The publisher describes the work as a "big novel about a small town."

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