Okay - from my recollection of the book, the authors make no specific claims regarding the crucifixion and resurrection of Christ. Specifically, they claim that Christ was married to Mary Magdalene (citing the wedding feast at Cana, the resurrection of Lazarus, and other evidence) and fathered children by her. They leave the question of Christs death open to interpretation.
So I've answered your question - be fair, and answer mine. Have you read the book, Holy Blood, Holy Grail or not? Thus far you've refused to answer that very basic question.