JK Rowling's latest book 'Harry Potter and the Half-Blood Prince' sold more than twice as many copies in the United States in its first two weeks as any other author's book in a whole year.
The latest in Rowling's series about a boy wizard won the Best Seller Award for the top-selling book in America in the year to 01 August, even though it only went on sale on 16 July. It has now sold over 11 million copies in the US.
Its tally of over six million copies in two weeks is more than double the nearest challenger, Dan Brown's ‘The Da Vinci Code’, which sold over two million. The fourth Harry Potter film, 'Goblet of Fire', is released here on 18 November.
