From the March 17, 2013 New York Times:
“How about this for a promotional thriller: Beginning TODAY on the 10th anniversary of the release of the mega-bestseller “The Da Vinci Code,” its publisher, Doubleday, will allow anyone to download the entire book (Inferno) free for a week.
For “Inferno,” Dr. Langdon will go back into the heart of Europe and untangle a mystery involving the poet Dante. The tight-lipped Mr. Brown has revealed little else about the book, but clearly Doubleday is expecting a sensation and has ordered four million copies for the first printing.
The free download will be available only in the United States and Canada through all e-book retailers, through March 24.“