So apparently the guys who wrote "Holy Blood, Holy Grail" finally figured out that Dan Brown used their book as source material for The DaVinci Code. In spite of the fact that Dan Brown acknowledges them more than a few times in the book, it took them until two months before the blockbuster movie of the year is released to get around to taking Brown to court. Can you say "opportunists"? Besides, I've read both books and "Holy Blood, Holy Grail" is the most boring book I have read in the last ten years. The DaVinci Code, on the other hand, is the quickest, most thrilling read I can ever remember. Can you say, "jealous"? If you want to read more about it, check out this story from Beliefnet.com.
Oh, and by the way, both books are complete and utter fiction!