A book was released by Professor Dr. Zaman Obaid Wanas, a lecturer in the Department of History at the College of Education for Humanities, entitled (The Birth of the GreatestMystery).The book “The Birth of the Prophet Muhammad”(peace be upon him and his family) is a manuscript by Sheikh Allama Ibn Arabi Muhammad bin Ali Al-Hatimi Al-Ta’i, who died in 638 AH. It deals with the birth of the Prophet (peace be upon him and his family) in its first chapters until its eleventh chapter in his prophethood (peace be upon him and his family). The importance of the manuscript lies in the fact that the author is one of the great Sufi sheikhs, in addition to the fact that its subject is concerned with the news of the birth of the Prophet, continuing to the news of the prophethood. The researcher presented a study and investigation of this manuscript, starting with a study of the author’s life, then the methods of investigating his manuscript, the purpose of the composition, and its importance, arriving at comparing the texts and commenting on them.