Listen to Three Interpretative Keys for the Book of Apocalypse or Revelation online. Three Interpretative Keys for the Book of Apocalypse or Revelation is an English language song and is sung by Douglas Jacoby. Three Interpretative Keys for the Book of Apocalypse or Revelation, from the album A Tour Through John (Everything You Need to Know from the Gospel the Letters and the Revelation Written by Apostle John in the Bible), was released in the year 2018. The duration of the song is 13:33. Download English songs online from JioSaavn.