Amorth's stated purpose in writing this book is to let people know that the devil is real, and the battle against him is ongoing.

Should you start to worry about the notion that facts are subjective and wonder if maybe there are alternative explanations for these utterly diverse phenomena - beware!Granted, this book presents an assortment of possession stories, but does not go into great gory details.

With this review I do not want to deny a blatantly stated truth of the Gospel - that demons exists and sometimes influence and even posses people. The author illustrates his statements with many examples and a witness of a victim on his possession and exorcism.

Finally, it most be noted that most people consider both exorcism and this book, because it discusses exorcism, as a Catholic matter. I could've been more patient with the pieces of the story (because it is a story) that don't make sense to me.

The author talks about signs to recognize demonic possession, yet says you cannot be certain until exorcism is attempted and you can't tell for sure even after one of two sessions. Amorth is brutally honest in revealing some dark secrets that failures in exorcism is quite common when the possession is deep rooted for many years in the victim. Many cases misdiagnosed as mental illness, however, are cured by the Rite of Exorcism, which is spiritual medicine. He also reminds the general public of the reality of this problem, and how one may become subject to demonic influences.It came as a bit of a disappointment to me that the process was so unlike that depicted in the new testament where the demons just flew out in the presence of Jesus. I had high hopes for this book and was eager to enjoy it, but unfortunately, there were a few logical inconsistencies that prevented me from fully embracing it. The author encourages priests to lead souls to God and to trust in God, and not to be afraid of the devil’s reprisal following exorcisms, which is very rare.

Nonetheless, notwithstanding these faults, Fr Amorth's testimonies are in line with the Word of God and sacred tradition. I have no issue whatsoever with religion, but I do take issue with people who let their religion influence their treatment of other people. And he performed them in spite of disobeying the Church and his own admission that people with mental health issues might suffer from the wrong belief they are possessed reinforced by needlessly receiving an exorcism. His book (first published about 1987), which widely includes the teachings of his teacher and mentor Father Candido Amantini (died in 1992), was intended to remedy this deplorable state of affairs and had soon some positive effect. In this it largely fails as a lot of the time exorcism does not resolve the problem, or it takes years.Fr Amorth is a man who deals daily with the awful realities of possession by evil spirits and exorcism. This book opened my eyes to things around me that I had no idea or felt were no big deal, were actually bigger than I had thought and was actually not good for myself. Amorth, former exorcist of the diocese of Rome, explains clearly and in accordance with Catholic beliefs that demons are among us (different from mental illnesses: he also explains the differences in the book). This includes even what most people think of as totally innocuous, such as the persistent use of foul language.