I read this as part of a men’s group and it wasn’t my cup of tea, personally. Spiritual warfare is real, but to me, the author too often ventures into what I will charitably call questionable assertions about things that he clearly doesn’t understand. “Demonic powers” behind… Dungeons and Dragons? Scientifically substantiated medical conditions are the result of demonic possession? Is it possible in some cases, sure. It is probable in most? Certainly not.
These and other examples discredit the author’s more valuable and, in my view, correct assertions. The premise is good, but the author goes a few bridges too far. I would not recommend.