The Serpent's Disciple is free again -
http://www.amazon.com/dp/B00EUBAVE0 - I missed it when it was free before but ereaderiq alerted me two hours ago that it'd gone free.
In this conspiracy thriller, an ancient evil threatens to take over the Catholic Church and use it to upset the world order. Peter Romanus, the Grand Master of the secret Masonic Order known as Propaganda Due has set in motion the final stages of his plot to kill the Pope and control major world governments through the Church.
Meanwhile, Anthony and Antonella “Nelli” Andruccioli feel a sudden call to visit Pesaro, the Italian town where their father was born and where their family has long protected a deep connection to Saint Anthony himself. The siblings soon learn that they are called to protect the Church: Nelli as the Chosen One, and Anthony as one of the Guardians sworn to protect her from the false prophet. Together they must navigate the labyrinth of ancient prophecy and Vatican politics and expose the truth before it is too late.