What it is it? A work of non-fiction? A documentary? An article in a newspaper or magazine?
On one level, The Last Templar is a fast paced contemporary adventure/thriller set in New York and in various settings around the Mediterranean, intercut by five epic chapters set during the closing years of the Crusades in which the last Templar of the title, entrusted with the Order's secret, escapes from the burning city of Acre and struggles to make it back to France. On another level, The Last Templar works as a thought-provoking exploration of religion in today's world, and of historic fact versus faith, particularly regarding the origins of the Catholic Church. Through the investigation into the Templars' history and their mysterious discovery, and though the interplay between Tess - the agnostic, scientific skeptic - and Reilly, who turned to the Church after his father shot himself when Reilly was just a boy, the book presents a spirited look at the early days of the Church and invites the reader to question matters which most of us take at face value.
"Invites the reader to question matters which most of us take at face value." But don't you dare question the "facts" and claims found in The Last Templar. After all, it's just a novel!