One million copies of Dan brown's The Lost Symbol sold in one day

Doubleday announced on Wednesday that The Lost Symbol, Brown's first novel since The Da Vinci Code, has already sold more than 1 million copies after being on sale for one day in the United States, Canada and Britain.
That total includes preorders for the book, which has been at or near the top of Amazon.com for months.

An additional 500,000 copies has been ordered, bringing the total print run to 5.6 million copies. The Lost Symbol came out Tuesday.

Kindle Nation, a blog for users of Amazon's e-book reader, reports however that the Kindle edition is ahead of the hardcover edition in Amazon's own hourly-updated sales rankings.

Brown's book was well short of the all-time debut, Harry Potter and the Deathly Hallows, which in its first day sold more than eight million copies in the US alone.