JK Rowling continues her book-selling wizardry.
Her latest Harry Potter book is flying off the shelves -- selling six-point-nine (m) million copies in the first 24 hours.
"Harry Potter and the Half-Blood Prince" is selling at a rate of about 250-thousand per hour in the U-S; that's more than the vast majority of books sell in a lifetime.
Sales figures from Britain are expected Monday.
Sales for the sixth installment of Rowling's fantasy series easily outpaced those for the previous Potter saga which came out in 2003 and sold five (m) million copies in the first 24 hours.