This book, which has been prepared by the Company of Mary, the religious community founded by Fr. de Montfort himself, is both an introduction to his spirituality of total consecration and a guide for those who would prepare themselves to make his Act of Total Consecration to Jesus Christ through Mary. it is also the fruit of this same Act of Total Consecration lived out in years of missionary service of Our Lord and Our Lady to the Roman Catholic Church which we joyfully make available to the people of God.