I remember when the Catholic News first posted a writeup on The Da Vinci Code, it included a priest (can't remember who) who implied that a good Catholic should not read the book because we should not expose ourselves to falsehood. I disagreed very strongly with that point. A good Catholic should read the book (borrow, don't buy), because many, many people, Christians and non-Christians, have read the book and have formed opinions based on it. To be a Christian in touch with the world is to understand and be able to correct these misconceptions should the opportunity present itself. After all a true, strong faith is one that is forged in fire, and not one sheltered from infancy. It's ironic that the second article by CN is subtitled "some advice from Father Henry Siew to people who cannot resist reading the book".
Just as a point interest, my students in NJC are very much still interested in the book. We set them a response paper asking them to critique a summary of the arguments in the Da Vinci code. Many had excellent responses while some truly believed Dan Brown's arguments.
Also, being very much knowledgable of early Christian belief in the Eucharist, why did Leonardo Da Vinci leave out the chalice in The Last Supper?
Detail of The Last Supper by Leonardo Da Vinci