Flipping between 3 stars and 4 stars because although it was an enjoyable read, the ending was rushed. Towards the end it seemed as though the authors just wanted to throw in some crazy (but cool) scientific and anthropological theories with no thought as to how it would fit in with the rest of the story.
The rest of the book offered a less glamourous, but poignant view on past-viewing (a non-interactive version of time travel). I particularly liked the sensitive, but touching exposition of Christ's life, and the fact that some historical mysteries are best left buried.