Diehard fans are already planning how they can get to the head of the queue at midnight on July 21 - the date named on JK Rowling's website for release of Harry Potter and the Deathly Hallows, the final book in the series.
Within a few hours companies like Amazon and Barnes and Noble began to offer Harry Potter fans the chance to pre-order Harry Potter and the Deathly Hallows.
The most recent book, Harry Potter And The Half-Blood Prince, the sixth in the series, broke UK records by selling 2,009,574 copies on its first day of release. Booksellers are predicting that the Deathly Hallows might yet outstrip that figure.
It is ten years since the first book, Harry Potter And The Philosopher's Stone, was published. Since then the series has gone on to sell 325 million copies worldwide and has been translated into 64 languages.