I gained a lot of useful insights in this book on the spiritual warfare; mostly about the real power of submission to God and waiting on God to fulfill His promises not in my time, but on His time and will; and also about the power of giving. I also got some answers about the questions I am fighting rght now, and I am thankful.

Yet, suffice to say that this is not the all-covering read on the subject. For two reasons:
1. The book covers only the "basic" spiritual warfare (think the realm of sins, not always the grave ones) and does not cover the heavy attacks or demonic possessions (think the need of exorcism). Maybe because we all are experiencing this "basic" temptations, yet only few (thanks be to God!) experience the real demonic possessions? Sure, the authoress is no exorcist and I also do not wish to read the scary stuff (I am honest here). Yet, the certain depth can be missing when covering just the "basics".
2. The book goes quite deep, yet is based on the authoress' (subjective) experience (and thus is structured like such). Which is not a bad thing per se and I am not in any means criticizing it, yet mine and your experience are not always the same.

Take this as a (warm and personal) starter on the subject, but also go deeper and read more sources, would be my advice.