Actually, it's a bit more involved than that my friend. While there is some reference to the enemy, there are also references to all known languages and sigils throughout the entirety of the book. They very clearly state that they are trying to include everything that is known to date to show how everything has been convoluted and polluted. Granted, in some of their practices they are misguided and knowingly use the enemy system, but they make clear that the reader need not do what they do. It's a compendium of sorts, nothing more. Which is exactly why I responded with the above: it's basic, nothing new, similar to early Tyson works etc... They are a novice couple who shared their experience with the reader, nothing more.