Dr. Heiser provides a solid biblical basis that unpacks the biblical worldview of the culture that surrounded the writers of scripture and their response to it by the Holy Spirit's inspiration. He uses scripture to interpret scripture. The scriptures relating to the "Last Days" become very clear. Beginning with Genesis and moving through the Old and New testaments he underlines how the sovereign Creator (Yahweh) WILL accomplish His great purpose in creation. As a pastor whose seminary training included Hebrew and Greek exegesis, Dr. Heiser's expertise in the languages and his extensive study of numerous related studies is most impressive - almost overwhelming in thought filled detail. The Unseen Realm comes alive in this work. HIGHLY RECOMMEND!