The first edition of the first Harry Potter book.
Its value would normally be set at around $30,000 U.S. dollars.
But this particular version is worth a lot more, says Sotheby's specialist Philip Errington, as it contains handwritten notes by its author, J.K. Rowling.
SOUNDBITE: Dr. Philip Errington, Sotheby's English literature specialist, saying (English):
"The sale title is 'First Editions, Second Thoughts' and the authors really have done that, they've had second thoughts on their texts they have revised, they've adapted, they've put illustrations in, they have really engaged with their original texts."
One of Rowling's notes explains the idea for Quidditch.
"Quidditch was invented in a small hotel in Manchester after a row with my then boyfriend. I had been pondering the things that hold society together, cause it to congregate and signify its particular character and knew I needed a sport. It infuriates men … which is quite satisfying given my
