I suggest you read The Templars and the Assassins: Militia of Heaven by James Wasserman. Very interesting read. A lot of what we know about the historical Assassins is slandar by their enemies. Also the characters of Assassin’s Creed are just as interesting as their historical counterparts. How Ubisoft took the legends of both orders and expanded them is amazing and a stroke of sheer brilliance.
When you’re conducting research: One of the first steps is to vet the author. Who are they? What’s their background? Once you understand that, you can make an intelligent assessment of what you’re reading.
For example, Wasserman is not a trained historian. In fact, as far as I can tell he doesn’t hold any formal degree. His area of expertise is mysticism and the occult. His own bio describes him as, “an admirer of the teachings of Aleister Crowley.” So, if you were researching modern American mysticism, he might be a decent point or reference. Detailed historical analysis? Not so much.
Another thing to consider, when writing non-fiction is that bold claims require strong evidence. In very general terms, claims don’t get much bolder than, “everything you know about this thing is wrong.”
Wasserman… doesn’t really do that. He collected a lot of interesting tidbits of trivia, though given the errors I found from skimming through the first few chapters, I wouldn’t trust any of it without first verifying in more credible sources.
Wasserman also appears to lack the ability to evaluate the quality of his evidence. This is a very important skill in academic literature, particularly when evaluating historical events. Not everything said or written is true, and as an academic, it falls on the author to evaluate the available evidence. This often involves looking at the larger context of contemporary events, the agendas of people involved, and the amount of surviving primary sources.
For example, confessions obtained under torture usually aren’t viewed as particularly credible. As we’ve said before, turns out when you apply enough force to someone, they’ll tell you whatever they think you want to hear, rather than actually coughing up the truth. Torture is a crude tool used to confirm your version of reality, and is not a functional investigative tool. And then Wasserman takes these confessions at face value, and tries to find some way to square them away with reality.
Yes, I am frustrated by Wasserman. He takes a fascinating part of history and injects it with confirmation bias so severe it would make a YouTube commenter blush. As a writer, there’s a real reason you should study history. Looking at why people, real people, took the actions they did can really help you understand how individuals think, and the options your characters have.
What Wasserman does very well is demonstrate how you can take real people and events, and distort them to fit your setting. (To be fair, it’s not an intentional demonstration.) This can be useful when you’re working off some “secret history of the world,” story, or when you’re writing an alt-history setting. If you want to write a story where the Assassins were secret defenders of an alien civilization that secretly founded western civilization, then Wasserman and Erich von Däniken are probably authors you should investigate closely. Also Assassin’s Creed, for the Dan Brown on mescaline vibe, and because that is the plot for Assassin’s Creed. (Though, von Däniken is pretty good for that flavor of weirdness in general.)
But, hey, at least Wasserman managed to secure an endorsement from a Golden Dawn magus for the back cover. So, you know, he’s got that going for him.