Rowling spokeswoman Nicky Stonehill told The Associated Press on Tuesday that Rowling, the "Harry Potter" author, signed "a few copies" of her detective novel as "Robert Galbraith." Wishing to keep her identity secret, Rowling made no promotional appearances for the book, published quietly in April, and Stonehill declined to say how any reader obtained a signed copy.
Bids for a signed first edition have topped $1,000 on eBay.
"Yes, those books will have value," said Angel Webster of Bauman Rare Books in Manhattan. "The first edition is already a scarce commodity and she only signed a handful of them under vague circumstances."
Webster added that it was too soon to know how much money a signed first edition might be worth. Signed first editions of the first "Harry Potter" book, published in 1997 in England as "Harry Potter and the Philosopher's Stone," are worth thousands of dollars. Webster said the value of a signed "Cuckoo's Calling" will depend on how well the novel ends up selling and whether it becomes the first book of a series.
"The Cuckoo's Calling" received favorable reviews when it first came out but attracted little attention from the general public. It is now No. 1 on Amazon.com, and publisher Little, Brown and Company has commissioned a new printing of 300,000 copies.
The novel features London detective Cormoran Strike. Little, Brown has announced that a second Strike novel is planned for next summer.