I got this book free on a Goodreads giveaway, but I had no idea when I entered to win it that it was based on Zen (Buddhist) organization. I'm not into witchcraft nor would I ever desire to open that door of destruction to my unborn baby or my marriage, so I wanted to give anyone looking into this a heads-up that this is the basis for the book.
The author also encourages mind-emptying meditation (very dangerous) and other forms of spirituality that can be ultimately harmful because they open up doors to the demonic. Again, had I known, I wouldn't have entered for the book, but I am just writing this as a heads-up to those who wouldn't be into that sort of thing, so they know. The book doesn't talk exclusively about eastern mysticism by any means, but it is definitely the focus of it.