For an in-depth look into spiritual warfare, we recommend our 7-part podcast series on Spiritual Warfare. We've heard from so many—including our team—how helpful this series is, and we feel you'll find it beneficial for understanding our thoughts around it even more.
As well, our Daily Prayer is a helpful tool to step into daily—something our team does. John's understanding of prayer comes from YEARS of walking with God and being trained in spiritual warfare. Ed Murphy's Handbook for Spiritual Warfare is a resource we trust, and fairly exhaustive. You might try looking there if you want/need more.