This article was featured today at The Daily Grail:
In the article, Baigent states that the "Jesus Papers" were found by a "businessman" who bought a house in Old Jerusalem in the 1960's and excavated under it. I don't think this detail is in the book, and I can see why he would leave it out. It does seem completely implausible if not outright laughable.
© Charles N. Pope, US Library of Congress. All rights reserved.