Hadrat Mirza Ghulam Ahmad (1835-1908), the holy founder of the world-wide Ahmadiyya Muslim Jama'at, born in Qadian, a village in rural Punjab, India, was the Divinely appointed Reformer of the latter days and the Promised Messiah and Mahdi. He was sent by God in fulfillment of the prophecies contained in the Holy Bible, the Holy Quran and Hadith, with the express task of rediscovering Islam in its pristine purity and beauty, and bringing mankind back to the Creator.

The Promised Messiah wrote Fountain of Christianity in March 1906, in response to the book Yansbi-ul-Islam, in which a Christian gentleman has tried to prove that the Holy Quran does not contain any new teachings and that the Holy Prophet merely copied the narratives from past scriptures-God forbid. The Promised Messiah responded to this objection, first, by raising serious doubts about the authenticity of the Christian Gospels, and then went on to show how the Holy Quran is a unique and peerless book, how so many of its prophecies have been fulfilled, and how its blessings live on to this day. In this small book, the author also argues against the doctrines of Trinity and Atonement held by present-day Christians, and shows that these beliefs have nothing to do with the teachings of Jesus himself.

The second part of the book, or Epilogue, consists of a profound thesis on the meaning of true salvation. The Promised Messiah describes salvation as "The abiding peace and happiness which man, by his very nature, hungers and thirsts for,and which is achieved through personal love and recognition of God, and through a perfect relationship with Him." - from Amzon