You are hereUCG.org / Sermons / The Book of Joel: a Call to Repentance, Part 1 The Book of Joel: a Call to Repentance, Part 1 Given on Sep 24, 2016 by Randy D'Alessandro Listen Downloads MP3 Audio (8.78 MB) Downloads The Book of Joel: a Call to Repentance, Part 1 MP3 Audio (8.78 MB) × The theme of the Book of Joel is The Day of the Lord. The message is a timeless one regarding our need of repentance and preparing for the Second Coming of Jesus Christ.