This week marks the 10th anniversary of Dan Brown’s most famous novel, The Da Vinci Code. To celebrate, the book’s publisher is allowing anyone to download the entire e-book for free between March 17-24. This free e-book also contains an excerpt from Brown’s upcoming Robert Langdon novel, Inferno. This is a brilliant way to promote a new book and a golden opportunity to snap up an engaging thriller for free. Take advantage while you can.