A Suffolk book printing company admits it is “proud and delighted” after being chosen to produce copies of JK Rowling’s crime debut novel The Cuckoo’s Calling.

JK Rowling’s publishers have reprinted 140,000 copies of her crime debut to meet demand after it emerged she had secretly written the novel under a false name.

The Harry Potter author was outed as the writer of The Cuckoo’s Calling on July 14, having published the book as Robert Galbraith.

But since it was revealed she was behind the book sales have rocketed, bookshops have sold out and the hardback has gone to the top of the Amazon bestseller chart.

And at Bungay book printing company Clays, which printed the first four novels of the Harry Potter series, officials have spoken of their delight after they were selected to print the new crime novel.

A Clays spokesman described it as a “good opportunity” for the company.

She added: “We spent last Monday sourcing materials for the factory to get production up to speed as soon as possible.

“We had no warning about it but are proud and delighted to be involved.

“Our first copies are off the press and have been dispatched.”

Despite the book being written under a different name, the novel – about a war veteran turned private investigator called Cormoran Strike – was praised by reviewers, although it had shifted just 1,500 copies since it came out in April.

JK Rowling was rumbled after The Sunday Times looked in to how a first-time novelist could produce such an assured debut work.

After being exposed she said: “I hoped to keep this secret a little longer, because being Robert Galbraith has been such a liberating experience.

“It has been wonderful to publish without hype or expectation and pure pleasure to get feedback from publishers and readers under a different name.”