JK Rowling's crime debut, The Cuckoo's Calling, has turned out to be the bestseller after it emerged that she had secretly written the novel under a false name.
The 'Harry Potter' author was exposed to be its writer at the weekend, having published the book as Robert Galbraith.
Since the author was unmasked, sales have rocketed, propelling the book to the top of the Amazon chart, and the digital version to No 1 in the iBooks chart, the Guardian reported.
The crime novel, which is about a war veteran turned private investigator called Cormoran Strike, had drawn acclaim from reviewers, although it had sold just 1,500 copies since its release in April.
