Born in 1673, at Montfort sur Meu in north-west France, St Louis Marie Grignion de Montfort was trained under the Jesuits, became a priest in 1700, and was later appointed an Apostolic Missionary by Pope Clement XI. He preached predominantly in Western France, and his teaching emphasized the importance of Mary as the "Co-Redemptrix" of humanity: "It was through the blessed Virgin Mary that Jesus Christ came into the world, and it is also through her that He must reign in the world." 'The Secret of the Rosary' is an early 'how to' book, written to help the ordinary person discover the...