Best-selling book The Da Vinci Code got a boost in sales when the paperback version of the book sold half-a-million copies in its first week of release in the US. Publishers say the book recorded the highest weekly sales for any paperback in history. The hard back version of Dan Brown's book has sold 40 million copies worldwide. The big screen version of the best-seller starring Tom Hanks and Paul Bettany will be later this year (06).