Can tantalizing clues to the solutions of great historical mysteries be inserted into novels? Do secret societies use codes concealed in fiction to communicate with those with eyes to see and ears to hear? By leaving clues in fiction, secret societies arm themselves with “plausible deniability”. They throw authorities off the trail. They get the information out there in a digestible form. Sometimes, the most profound information is cloaked in fiction. The classic example is the Holy Grail. How many people ever cracked the code?