After author JK Rowling revealed she is the author of the crime novel "The Cuckoo's Calling", it immediately rushed to the top of many book charts and 300,000 reprints are reportedly under process.

Imagine everyone's surprise when JK Rowling revealed to The Sunday Times that she was indeed the writer of the April 2013 released crime novel "The Cuckoo's Calling." The author revealed she had written the book under the pseudonym "Robert Galbraith."

Before the revelation the book had sold less than 500 copies in the U.S. and just about 1,500 copies in the U.K, reveals Nielsen BookScan. However, within hours of Rowling revealing she was the author of the book, the novel rushed to the top of many book charts, the Guardian reports. The novel rose more than 5,000 places to top Amazon's sales list and the digital version is now also at number one in the iTunes book chart.

The growing demand for the book has led to a shortage in stock and publishers Little, Brown & Company have ordered a reprint of 300,000 copies. Many independent bookstores have ordered for fresh stock with their last copies of the book being sold out and more customers showing interest in purchasing the book.

Owing to this scarcity, the price for copies from the first edition has gone up drastically. A U.K., signed first edition of "The Cuckoo's Calling" is currently being auctioned off and is expected to fetch nothing less than $1,300.

A press representative for Rowling, Nicky Stonehill at StonehillSalt PR, confirmed that the author did sign "a few copies" of "The Cuckoo's Calling" but cannot confirm the authenticity of books being sold online that claim to be signed by the author.