The book immediately broke sales records, becoming the fastest selling adult-market novel in history, with over one million copies sold on the first day of release. By the end of the first week, a total of two million copies had been sold in the U.S., Canada, and UK. According to the publisher, the rapid sales prompted the printing of an additional 600,000 hardcover copies to the 5 million initially printed for the US market. On its first day the book became the #1 bestseller on Amazon.com, and the Amazon Kindle e-reader edition became the top-selling item on Amazon.com, outselling Amazon's sales of the hardback copy of the novel, which is the sixth best selling book of 2009 on pre-publication orders alone. "The Lost Symbol" also ranked as the #1 bestseller in Amazon's Canadian and British sites. Both Barnes & Noble and Waterstone's reported the book has broken all previous records for adult fiction in the United Kingdom. According to Nielsen BookScan data, 550,946 copies of "The Lost Symbol" were sold in its first week of sale, taking $7.49 million. By the end of the second sales week, Transworld intended to have 1.25 million copies printed.