Praying the Rosary had an important place in the apostolate of St. Louis-Marie Grignion de Montfort (1673-1716). One of the most honourable titles conferred on him was that of “Apostle of the Cross and of the Holy Rosary”. This book was written by Montfort towards the end of his life but printed for the first time only in 1912, almost two centuries after his death. Although it was not published during his lifetime, he certainly intended it to be made available to the faithful. Pope John Paul II described it as “precious” in his Apostolic Letter Rosarium Virginis Mariae (no. 8), where he mentions Montfort among the saints “Who have found in the Rosary an authentic way of holiness”.