The Power of the Rosary is an Abridged Version of St. Louis Mary DeMontfort's "The Secret of the Rosary" Written almost 300 years ago, this book is timeless and helpful in fulfilling Our Lady's request at Fatima and at many other Marian sites that Catholics say the Rosary as the central devotion to her Immaculate Heart.155 pages 4 3/4" x 6 1/2"