The publisher should be ashamed of this digital version, which seems to have been created by scanning the printed version and skipping the proofreading. As an example of the poor quality of the digital version, this is a Sigma Force novel, yet in an early chapter where the protagonists are given a report with the Greek letter sigma on the cover, the digital version has a question mark instead of a sigma! Ellipses in the printed version, to indicate that someone was interrupted in mid-sentence, are frequently rendered as a space in the digital version. The scanner that created this version was also confused by text in italics, often not including the space after the last italic word. In addition, with the printed version you get a couple of useful maps - Europe and the Vatican - that are so small in the digital version that they're useless. Finally, the story itself isn't as well crafted as Rollins' other novels, relying too much on extended action sequences for my taste.