Yes, there are still people who haven't read The Da Vinci Code. But the number seems to be shrinking. Dan Brown's international sensation has sold around 1.4 million copies in its first month as a paperback release, a big number for any book and astonishing for a novel that's already sold more than 40 million copies in hardcover.

"There are more than 300 million people in the United States, so we still have a lot of potential sales out there," joked Russell Perreault, vice president and director of publicity for Vintage Books and Anchor Books, paperback imprints of Random House Inc.

Perreault said Tuesday that he expects sales to remain strong thanks largely to the upcoming movie version, starring Tom Hanks and scheduled to come out May 19. The Da Vinci Code had an initial paperback printing of 5 million copies, but that was soon raised to 6 million.