The eBook employs the Holy Scripture fully to deliver the Trinitarian origin and power of the Holy Rosary. It presents the scientific exposition of the Doctrine of the Holy Trinity to show that God truly exists. It features the call of Mary by God the Father to carry out a great mission outlined in the Divine plan of protection and salvation using the Holy Rosary. He promised to cause her name to be celebrated forever using the Holy Rosary of which the Holy Trinity participated. And He fulfilled the promise. Illustrating with the Chaplet of the Holy Rosary, it fulfills ten-stringed biblical harp of God. It further explains how the Lord Jesus made the Our Father; God the Father and the Holy Spirit, the Hail Mary stanzas; and the Angels, the Glory Be. It presents the four meditative Divine Mysteries as the whole life of Jesus Christ from incarnation to glorification in Heaven. Then all these put together are a wholesome great prayer second only to the Holy Mass. The beautiful quotes of the Popes and Saints and the promises made by God express the need for the Holy Rosary.