Whoa! Great book...if you like the DaVinci Code then this one is a good read too. Similar fast pace, lots of historical info, super cool because we've been to Rome ;) .
Here is the info from the back: "With the Vatican in turmoil, SIGMA Force (a secret US agency, of course) leaps into action. An elite team of scientific and Special Forces operatives under the command of Grayson Pierce and accompanied by Lieutenant Rachel Verona of Rome's carabinieri, they are pursuing a deadly mystery that weaves through sites of the Seven Wonders of the (ancient) World and ends at the doorstep of an ancient, mystical, and terrifying secret order. For there are those with dark plans for the stolen sacred remains that will alter the future of humankind...when science and religion unite to unleash a horror not seen since the beginning of time."
The description sort of leave out a few details, the whole story centers around the Magi, the priests who went to see Baby Jesus, and how they were tied to sort of an old scientific/alchemey sect that discovered the true 'manna'. It's too complicated to explain it all but I always find the hidden history interesting...like where there really just three Magi? and liquid body armor? [(developed by the US Army) why aren't our soldiers more protected then?] The Imperial Dragon Court is really made up of European aristocrats (which dates from the Middle Ages)? So much interesting information...