This book is a really good read for anyone interested in Rennes-le-Chateau. For those who have read "Holy Blood, Holy Grail" by Baigent et. al., this is a totally new and different perspective on the mystery. The basic premise of "H.B., H.G." is that Jesus didn't die on the cross, but has a direct line of decendants to the present day, and relates this to the secret organization Prieur de Sion and Freemasonry. Wood and Campbell take the same information Baigent et. al. used to derive this hypothesis and, using a more mathematical approach, relate the secret of Rennes-le-Chateau not to Jesus Christ, but to a returning comet that will destroy the earth at a certain date. Worth reading!