The author explores the connections between the visions seen by the Apostle John and previous prophetic revelation given to Old Testament prophets such as Daniel, Ezekiel, and others. It is the author's conviction that an understanding of related passages elsewhere in the Bible is the most important key to unlocking the bewildering variety of interpretations which often accompany the study of the last book of the Bible. The commentary is linked to a free companion internet course providing an additional 70 hours of audio instruction.