Which J.K. Rowling novel was published under her own name but is not fantasy?

The Casual Vacancy is the J.K. Rowling novel published under her own name that is not fantasy. Little, Brown published it in 2012 as Rowling’s first novel for adults after the Harry Potter series.

The story is set in the fictional English town of Pagford, where the sudden death of parish-council member Barry Fairbrother creates a contested vacancy. The resulting political and personal conflict exposes tensions involving class, poverty, addiction, family, and local government.

Unlike Rowling’s Harry Potter books, The Casual Vacancy contains no magical world or supernatural adventure. It is a contemporary social novel with an ensemble cast and an adult readership in mind. Rowling later returned to crime fiction with novels published as Robert Galbraith, but The Casual Vacancy remains the work most directly associated with her transition from children’s fantasy to adult literary fiction.