Informed Intercession will help Christians and church leaders develop strategic prayer strategies for their cities-to see their towns transformed for the kingdom of God. The principles of spiritual mapping and strategic prayer are simple-and biblical. According to Ephesians 6 and other passages, demons can occupy territories and regions. As the author describes it, spiritual mapping is "an attempt to see your city as it really is, not what it appears to be." The goal is to push back the demonic darkness by identifying strongholds, attacking these areas with concentrated prayer, then infiltrating vanquished enemy's domain with the good news of Jesus Christ. Spiritual mapping is a means to an to move beyond breakthrough into complete transformation for your city or region.
It's not exactly a riveting read, but it is a systematic and appropriately detailed introduction the concepts. I'd only suggest reading it if you intend to do this sort of project (city/regional intercession).
Spiritual mapping in part is extra-biblical so I am cautious about embracing the topic; however, there was a lot of good information in the book. I really enjoyed the first chapter on revivals in various parts of the world due to repentance and targeted prayers and well as the unity of believers.