HOW MANY COPIES OF THE DEVINCI CODE HAVE BEEN SOLD/

Hi agjr

About 40 million copies worldwide according to various newspaper reports e.g.
http://www.timesonline.co.uk/article/0,,2-2078813,00.html

Actual sales figures for books are hard to come by.  Publishers often
send books to bookstores on a "returnable" basis, meaning that the
bookstore can return the books to the publisher for a refund or credit
if the books don't sell.  Thus, publishers know how many copies they
have shipped out, but it may be months before they know whether the
bookstore will be sending the books back.

There is a BookScan system (by Nielsen) that keeps a record of actual
sales when the book is scanned at a cash register.  There is probably
a formula to guess how many additional non-scanned copies are sold
(e.g., in small bookstores not participating in the bookscan system). 
I'm not sure whether the publisher will release the BookScan data to
the public, though.