Bookseller.com reports that a leaked memo indicates that Dan Brown's The Lost Symbol helped Random House improve its ebook sales by - whoa! - 400 percent.
"According to an internal Random House report, sales of its Kindle e-books through September 2009 came to $22.6m, an increase of almost 700% over the $2.9m in revenue that the Kindle generated during the same period in 2008.
Crain's reports that the The Lost Symbol sold 100,000 e-books its first week out, or about 5% of total sales for the book. In the first half of 2009, Random House e-book revenue grew by 400%, a Random House spokesman added, a figure previously disclosed."