There’s been a huge surge of interest in Robert Galbraith’s debut crime novel The Cuckoo’s Calling today.

That’s because “Robert Galbraith” was revealed late yesterday as Harry Potter author J.K. Rowling.

The book’s publisher has been touting the book as a “classic crime novel in the tradition of P.D. James and Ruth Rendell.” Up until yesterday, it had sold around 1,500 copies in hardback. But in the hours since its author was revealed, it has hit the bestseller list. Amazon is currently out of stock and listing it as shipping in 10 to 14 days (Barnes & Noble still has it in stock online). If you want a first edition hardcover, you better move fast.

The Sunday Times has reported that Rowling has completed a second novel featuring the same detective, Cormoran Strike. It is due next year. Rowling’s first novel for adults, The Casual Vacancy, was published last year.

After losing his leg to a land mine in Afghanistan, Cormoran Strike is barely scraping by as a private investigator. Strike is down to one client, and creditors are calling. He has also just broken up with his longtime girlfriend and is living in his office.

Then John Bristow walks through his door with an amazing story: His sister, the legendary supermodel Lula Landry, known to her friends as the Cuckoo, famously fell to her death a few months earlier. The police ruled it a suicide, but John refuses to believe that. The case plunges Strike into the world of multimillionaire beauties, rock-star boyfriends, and desperate designers, and it introduces him to every variety of pleasure, enticement, seduction, and delusion known to man.

You may think you know detectives, but you’ve never met one quite like Strike. You may think you know about the wealthy and famous, but you’ve never seen them under an investigation like this.

The Cuckoo’s Calling was published April 30 by Mulholland Books. It is 464 pages, priced at $26 for the hardcover (if you can find one). You’ll have better luck with the digital edition, priced at $12.99.