JK Rowling fooled the literary world when she published a new novel under the pseudonym Robert Galbraith and the Harry Potter author doesn't seem particularly thrilled that her secret is out.

The author's new crime novel, The Cuckoo's Calling, was released at the end of April. Last week The Sunday Times spilled the beans on the alleged Galbraith, working on a leak that came from Russells Solicitors.

According to the BBC, the wife of a Chris Gossage, a Russells employee, revealed Galbraith's true identity to a friend, Judith Callegari, who later tweeted the information to The Sunday Times.

"I feel very angry that my trust turned out to be misplaced. To say that I am disappointed is an understatement," Rowling said in a statement, according to the BBC. "A tiny number of people knew my pseudonym and it has not been pleasant to wonder for days how a woman whom I had never heard of prior to Sunday night could have found out something that many of my oldest friends did not know,"

While Rowling's use of a pen name kept her new novel from getting the hype and high expectations that surrounded her previous works, The Cuckoo's Calling has recently jumped to No. 1 on the Amazon best sellers list.

Tags: JK Rowling