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Sales of JK Rowling's secret crime novel soar

Sales of JK Rowling's crime debut, The Cuckoo's Calling, have soared after it emerged that she had written the novel under a false name.

It was revealed yesterday that the Harry Potter author had secretly written the book about a war veteran turned private investigator under the name of Robert Galbraith - something which she described as a "liberating experience".

Sales of JK Rowling's crime debut, The Cuckoo's Calling, have soared Credit: Matt Crossick/Empics Entertainment

Despite receiving critical acclaim, the crime novel sold just 1,500 copies since its release in April.

However the subsequent revelation has helped propel the hardback to the top of the Amazon bestseller chart while the digital version is number one in the iBooks chart.