The Strongman book is an excellent source for getting to know who your enemy is and how to stand in that knowledge. The book goes through the sixteen strongman named in the Bible and elaborates on what they mean. Excellent resource for spiritual warfare preparation.
This book has a few good points but others I disagree with. It says, among other things, that your spirit is actually physically located in your belly (based a translation of one word that occurs in KJV but not others). It also states that all rock music is from Satan. I believe that these authors use Scripture passages in a misleading way.