Sorry it's not actually from Facebook, but there didn't seem to be a better community for it.
I live in a neighborhood with a large elderly population, and we all got one of these in in the mail today. Looks like they're not just satisfied with recruiting people into the conspiracy theory cult from Facebook and YouTube anymore...
I could see a lot of people falling for this, thinking they've been out of the loop from not having the internet.
It's Seventh Day Adventists trying to convert people. The Great Controversy was written by one of the co-founders of the religion.
This kind of thing isn't new. They're not "leaking" off of Facebook. This specific type of conversion literature has been around for a century.