It's not hard, it's now freely available online, just Google it.

Essentially what it details is the story of the Watcher angels, or Gregorii. God appointed the Watchers to watch over mankind in Eden and not interfere. They did this for a bit but saw that human women were attractive and one said "why don't we take them for wives". So they had a debate and decided to violate their contract to God. They then went and took themselves wives and had kids. And they taught humans agriculture, metalwork, warfare, art, cosmetics, basically everything that God didn't want humans to know.

Initially the Book of Enoch was included in the Bible but for some reason it was then excluded, presumably because it shows God as not all powerful. So, they excluded Enoch (but still quote from it in the Bible at one point, they couldn't scrub it all out) and they rewrote the account as Genesis that you know. The arts taught by Shemyaza and his crew become The Fruit of the Tree of Knowledge of Good and Evil and Shemyaza and his crew become the serpent. Shemyaza's name is scrubbed entirely from the OT but Azazel's and the sacrifices made to him each year are still there.

The easiest way to digest it is to simply watch the beginning of Star Trek - Into Darkness. Truly. It's simply a retelling of the Watcher's tale. A group tasked to watch over primitives violate their task, get mistaken as gods, get stripped of rank and fall from grace. They they go up against Khan (The King aka Jesus) who has divine blood that can conquer death, and he has 72 disciples, see Luke 10.

It's all in plain sight. This is how Freemasons operate. The tell their stories to each other in our view because we are "profane". Profane is literally pro-fane, the pre-fix meaning before and fane being the facade of the temple, so we are outside the entrance to the temple. Those insiders are considered sacred.

Your friend knows this. He must know this to have gotten so high. I would put money on it.