It depends what you are looking for in reading this book. If you are looking for a novel following the series:

Sword of the Templars - 2009
The Templar Cross - 2010
The Templar Throne - 2010
The Templar Conspiracy - 2011
The Templar Legion - 2011

then by all means purchase/read. It is Mr. Christopher's style throughout with add-ons and is typical as are his other books. Prepare yourself for inaccuracies in detail and once again, challenging Dan Brown through encrypted means by referring to the hype. If you are a Dan Brown Fan, you make take offence, but if taken at face value, it would appear Mr. Christopher is trying to use this hype in adding credibility to his story line.

The story is fast paced, challenged and suspense full. Great read on an airplane or when travelling.

Doc Holliday is once again the main character and the ever learned guardian of Templar secrets. He teams up with a nun, and the two are lead on a clue based adventure through Europe in trying to discover a relic. Several other factions are in competition in locating this relic while at the same time trying to secure what Doc controls - Templar knowledge. These factions include the Vatican-of course, the ancient blood line of Rex Deus, and another natural - US government.

Add the typical action sequences and a nice plot which I will not spoil and you have an enjoyable book to that entertains and challenges your imagination.

If this is what you are seeking? - purchase, 4 stars. If looking to analyze against true, possible historical events/possibilities, you may want to pass, 2/3 stars.

I enjoyed it.