The original title was The Sign: The Shroud of Turin and the Secret of the Resurrection (Viking UK, March 26, 2012). Now there is a reprint edition, The Sign: The Shroud of Turin and the Birth of Christianity (Plume; Reprint edition, March 5, 2013). Notice the subtle change in the title and the new cover. This reprint edition includes a hardcover version for $26, a paperback version for $16 and a Kindle version for $10. How often do you see a hardcover in a reprint.