9Explore the four angelic visits surrounding the birth of Jesus with Susan Robb in The Angels of Christmas, a four-week Advent study. The Angels of Christmas: Hearing God's Voice in Advent, a four-week Advent study by Susan Robb, explores the four angelic visits surrounding the birth of Jesus with Zechariah, Mary, Joseph, and the shepherds. In this study, the reader will explore the visits and dive deep into the history of the angel Gabriel-and other angels-in the Old Testament. The Angels of Christmas uses these four angelic appearances to discuss God's presence in history and our lives today. The messages of the angels hold meaning for listeners both then and now.