Dr. Tranquilla brings together his professional calling as an engineer with his passion as a parent, teacher, mentor, Christian disciple and disciple maker. In this book, he draws on his firsthand ...view moreDr. Tranquilla brings together his professional calling as an engineer with his passion as a parent, teacher, mentor, Christian disciple and disciple maker. In this book, he draws on his firsthand knowledge of technology and military systems, history and Biblical truths to shed light on the important subject of Spiritual Warfare, why it is so important today, and how to do it effectively.view less