J.K. Rowling has been unveiled as the author of an acclaimed new detective novel.

The 46-year-old Harry Potter writer has revealed that she relished the freedom of writing The Cuckoo's Calling under her pseudonym Robert Galbraith.

In a statement released by her publicist, Rowling said: "I hoped to keep this secret a little longer because being Robert Galbraith has been such a liberating experience," she said in a statement released by her publicist on Sunday. "It has been wonderful to publish without hype or expectation, and pure pleasure to get feedback from publishers and readers under a different name."

The Cuckoo's Calling tells the tale of a war veteran turned private investigator who is called in to probe the mysterious death of a model.

The novel had sold around 1,500 copies in hardback. However, in the hours after Rowling was named as its author, it rocketed up the bestseller charts.

Rowling released her first adult novel, The Casual Vacancy, last year to mixed reviews.