"Muhammad Farid Abu Hadid" was the owner of a different and distinguished curriculum in his studies and books in the field of history; Where he was interested in discussing and presenting historical events through several views without being satisfied with narration and narration, and he committed this to this study in his study of the character "Salah al -Din al -Ayyubi", so he reported the neutrality of what the Arabs and the Franks narrated about, and the reader did not drown in stressful and useless historical details and only concerns the researcher Specialist. The book begins with a narration of what was since the emergence of the call and spread of Islam and the establishment of the Muslim state, then recounted the history of the successive colonial Crusades that have been able to find a foothold in the Levant in the negligence of Arabs and Muslims, so that the humble piety leader Salahuddin changes history and returns Jerusalem to the Arabs again .