Wizarding World (website)

"J.K. ROWLING HAS SOMETHING NEW TO ANNOUNCE. This is not a new book, but it is something equally exciting. As a teaser before the official announcement, ten letters have been hidden on this website for you to find. To locate them you just need to enter ten individual coordinates in the search box and explore. The coordinates are being revealed among ten Harry Potter fan sites throughout the 15th and 16th of June 2011. Find the correct sites and you could be one of the first to piece the word together."

- Some information on the challenge at SecretStreetView.com.

Pottermore is a recent mystery project of J. K. Rowling's. It was announced on 15 June, 2011.

As a teaser for Pottermore's announcement (then a complete mystery, other than not being a new book), a challenge consisting of finding letters, using coordinates being revealed among ten Harry Potter fan sites, to piece together a word with the subject of her announcement. A while after all letters are revealed (E-T-O-T-O-P-E-R-R-M), Pottermore.com was launched with a "coming soon" message and Rowling's signature.