J.K. Rowling fans in the United States were disappointed when the author announced she’d be making just one stop in US this year to promote her upcoming book, The Casual Vacancy, at New York’s Lincoln Center to a crowd of just over 1,000.

Tickets accidentally went on sale early and now the highly anticipated event is oversold.

Little, Brown and Company, the publisher putting out the new book, arranged for the event to take place in the Jazz at Lincoln Center theatre on October 16. Rowling is set to be interviewed on stage by author Ann Patchett, answer a few audience questions, and sign copies of The Casual Vacancy for everyone with a ticket.

Tickets for the event were publicised as going on sale 10 a.m. on September 10 but went on sale 12 hours early, at 10 p.m., on Lincoln Center’s website only. They quickly sold out but the message didn’t get to the box office. Sales took place in person the following morning before the glitch was realised.

Due to a security breach, tickets for the J.K. Rowling event on October 16, 2012 were made available prematurely at 10 p.m. on September 9. Jazz at Lincoln Center is in the process of investigating how this occurred and what arrangements may be made to honour each ticket purchased, and will provide an update as quickly as possible. Neither Rowling nor Little, Brown and Company are responsible for this situation. Jazz at Lincoln Center apologises for any inconvenience, the Center said in a release.