J.K. Rowling has confessed to writing a mystery novel under the pseudonym “Robert Galbraith. Mulholland Books published The Cuckoo’s Calling in April, attributing the book to Galbraith.
You can sample The Cuckoo’s Calling at this link. Little, Brown publisher Reagan Arthur issued this statement:
We are pleased and proud to have published THE CUCKOO’S CALLING, and we’re delighted by the response it has received from readers, reviewers and fellow writers. We are really looking forward to publishing the second book in the Strike series next summer … A reprint of the book is under way and will carry a revised author biography, which reads “Robert Galbraith is a pseudonym for J. K. Rowling.”