Having read James Twining's previous two books, The Double Eagle and The Black Sun, I expected a little more from this offering. The historical mystery seems overshadowed by action sequences that are a cross between Jason Bourne, Mission Impossible and Wile E Coyote. He also introduces several shadowy underworld figures that are almost unbelievable and are certainly unrealistic.
If judging this book as a screenplay for an action movie, I would give it 3 stars. As an Dan Brown-esque historical, conspiracy theory mystery it is about 2 1/2 stars.