A first edition copy of Harry Potter and the Philosopher's Stone containing a rare error is likely to reach up to £20,000 when it goes on sale in London.
The rare typo is the repetition of "1 wand" in Harry's list of school supplies for Hogwarts. The edition is one of only 500 hardback copies which contain the mistake as it was removed in subsequent publications.
The copy of JK Rowling's first novel is expected to fetch £15-000 - £20,000 when it goes on sale at Bonhams Fine Books and Manuscripts Sale in London on November 9.
Bonhams' Head of Books and Manuscripts Matthew Haley said: "As the first book in the series, Harry Potter and the Philosopher's Stone has a special place in the affections of the millions of readers across the world and the proof reading error about the wand in the first edition has, of course, become a treasured piece of Harry Potter arcana."