This is the 2013 Revised Edition which is supposed to have the foul language removed from it. Unfortunately, as was the case with "Powers and Principalities", they didn't quite remove all of the foul language. There's still occasional foul language that was left in this version. Other than that I found "Pharmakeia", a fascinating read and even harder to put down than "Powers and Principalities". I say 4 1/2 stars but GoodReads doesn't allow 1/2 star ratings. I am now starting "Dark Matter", the third of the three Dan Calabrese books.