Good resource. I would also like to point folks to a book by one of my favorite historical Jesus scholars Dr Darrell Bock (of Dallas Seminary) called
"Breaking The DaVinci Code". I would also suggest a dvd set by Dr Ed Hindson of Liberty University. The set is called
"The DaVinci Code Deception". There are two dvds. On the first Dr Hindson is speaking to students at Liberty University on the problems with the novel. Then, on the other dvd, there is a round table discussion with Dr Ed Hindson, Dr Ergun Caner, Dr Elmer Towns, and Dr Dan Mitchell (great teachers, each). This is a wonderful resource for the person who is curious about this issue (and who does not have a strong background in church history and/or New Testament studies). I would also recommend it for someone who has a strong background in those subjects (it is a great sermon).
Above that I would advise everyone to become a student of CHURCH HISTORY. Why? Because if one knows church history one will not be mislead by Brown's unhistorical claims. So a healthy knowledge of church history is also good to have.
There are many good church history books out there. Since I don't have room/time to list them all I will list three good general introduction books.
The first book is a two book set by Justo Gonzalez. The books are titled "The Story of Christianity Volume I" and "The Story of Christianity Volume II". Both can be purchased from Amazon.com.
The second book is "Turning Points: Decisive Moments In The History of Christianity" by Mark Noll. Again this can be purchased from Amazon.com.
The final book is "Christianity Through The Centuries" by Earle Cairns. This book also can be purchased from Amazon.com.
Above all of that I would advise a person to DAILY be in the Word of God, for His Word is truth. If you are spending time with Jesus every day in prayer and in His Word you are less likely to be mislead by Brown's deception.
In Christ,
Martin.