The devil is real — that much, most Christians agree on. But ask what the Bible actually says about him — who he is, what he can and cannot do, how he works — and the answers get foggy fast. Some of what we believe came from Scripture; some came from sermons, movies, and tradition; and some came from the enemy himself, who has no objection to being misunderstood. Know Your Enemy opens the five-book Demonology Study Series by laying the biblical foundation, in sixteen chapters and three parts — and it starts where the fog starts: what does Genesis 3 actually say about the serpent, and what does it never say?

Part 1 stays inside the text: Satan through the Old Testament, where satan is a job description before it is a name; the “Lucifer” passages of Isaiah 14 and Ezekiel 28 read in context, with the strongest case for the traditional reading stated at full strength; the enemy’s names and what they actually mean in Greek and Hebrew; the kingdom and its ranks, where Ephesians 6:12 gives four terms and no org chart; where demons come from, with the four theories of their origin each rated; what evil spirits actually do in the biblical data; and possession, oppression, and the believer’s authority — including the study’s 95% rule, that most human problems are flesh, circumstance, and consequence, not demons. Part 2 follows the demonic into the world: the testimony of John Ramirez, received as strong as report and fenced where it reaches beyond the evidence as cosmology; the nations and their spirits; and satanic agency in human societies. Part 3 turns to the church: the falling away of 2 Thessalonians 2, church history put on trial, deception in the modern church, and seven rules of discernment to close.

The study audits its own teachers as it goes: a famous preacher’s count of a Hebrew word is checked against the text and corrected; a beloved illustration about Psalm 91 is rated refuted as exegesis while its pastoral point is kept; a sacred-name teacher’s signature claims are separated into what is strong, what is disputed, and what is refuted outright. Every chapter ends with review questions, and the back of the book carries the receipts: language notes on key terms, a claim-to-source map, and a register of claims flagged or excluded outright, so nothing is quietly smuggled in. Throughout, the standard is the Hebrew and Greek text rather than any English wording. No horror stories for effect, no speculation dressed as revelation: name the belief, ask whether the Bible actually says it, then stand on what it says — and learn to tell, for yourself, where the text ends and the fog begins.