Well, you might try checking where in every book store the book is found. Hint: It's not in Theology, Non-Fiction, or History. I would think that if an author penned something that he wanted to present as historical or non-fiction, then THAT is where the book would be found
For all the rabid Catholics and non-Catholics alike...
Ephesians 4:29-32
Do not let any unwholesome talk come out of your mouths, but only what is helpful for building others up according to their needs, that it may benefit those who listen. And do not grieve the Holy Spirit of God, with whom you were sealed for the day of redemption. Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice. Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.