As embarrassed as I am to admit this, my thinking on Satan and demons has almost solely been shaped by Lewis' Screwtape Letters and Peretti's This Present Darkness. Until now. Dennis McCallum has written a much needed work for Christian literature in Satan and His Kingdom. It is well studied, biblically balanced, and very readable.
While it may not be at the top of my list of recommended reads for the new Christian, it most certainly is for anyone in church leadership. Dennis McCallum is frank about spiritual warfare being fought around us and the tendency of most Christians to fall into a "peacetime mentality". While he is not seeing demons around every corner and behind every temptation, McCallum is honest and strongly biblical about the existence and activity of spiritual beings opposed to God and his children.
Many Christians are too quick to attribute every temptation and conflict to Satan and his minions ("The devil made me do it" type of people) rather than our own sinful tendencies and the system of the world. Others ignore their reality to the point of verging on naturalism. Dennis McCallum is a fresh voice bringing balance and biblical insight into the all too real battle going on around us.
If I have one criticism, it is that after a couple chapters of such subject matter, I felt like I needed to cleanse my palate, put the book down, and read the Bible. But I think McCallum would be happy with that.