Definitely one for fans of Dan Brown: long kept religious secret that many want to keep hidden, and a slew of shady characters. This has all the elements: adventure, conspiracy, mystery. The religious theology is well researched - some readers may find this a little too heavy, specially if looking for a standard thriller. It stands out from the rest - and could quite easily have have formulaic in its presentation.

My one bug-bear: a few less characters, and a little more development of the main characters. Its quite lengthy at @ 554 pages, so keep in mind when settling in for a quiet read.