According to the beliefs of Fiqh-E-Jaferia.... 
Al Ghadir (Arabic: الغدير في الكتاب والسنة والأدب) (that is "The Ghadir in the Book, the Sunnah, and Literature") is a 20-volume book written by the Iranian Shiascholar Abd Al Husayn Amini.
The main subject of this book is discussing Hadith of the pond of Khummaccording to Sunni documents. In order to do so, Amini has gathered the narrations of 110 companions (Sahaba) as well as 40 followers of Muhammadabout the event. He then states the related Hadiths narrated by 360 Hadit narrators between 2nd to 14th centuries of Islamic calendar. Since Sunni Muslims - unlike Shia Muslims - do not consider Ali as the immediate legitimate successor of Muhammad, Amini in his book has tried to ‌prove Ali's succession based on Sunni documents. Amini, in writing the book, traveled to different countries in order to take advantage of the libraries there among which were India, Iraq, Pakistan, Morocco, Egypt and some others.
The first print of Al-Ghadir book published in Najaf City and developed by 9 volumes. After publishing of this great book, most of scholars of different Islamic countries wrote an explanation on it.
 
About the Author:
Sheikh Abdul Hossein Amini (Persian: عبدالحسین امینی) was a Shia scholar, traditionist, theologian and jurist. His magnum opus is Al-Ḡadīr fi’l-Ketāb wa’l-Sonna wa’l-Adab .
He was born in the city of Sarab near the Ardabil, both his father Mirza Ahmad Amini and his grandfather Najaf Ali, were jurists of the city.
Education: His teachers included Abul Hasan Esfahani, Muhammad Hosein Na'ini and Muhammad Hossein Esfahani,
Works: Abdul Hussain established a library in Najaf and named it “Amir al-Mo’menin”. He wrote many books and treatises, most of which have been published. He wrote books about Shiʿite beliefs, Hadith and jurisprudence. Some of his books are :Al-Ḡadīr fi’l-Ketāb wa’l-Sonna wa’l-Adab. An encyclopedic work which examines the tradition of Ghadir-e-KhummSīratonā wa sonnatonā sīrato nabīyenā wa sonnatoho(Arabic: ثمرات الأسفار)Commentary on Fatiha surahMartyrs of virtues (Arabic: شهداء الفضیلة)Consequences of Trips (Arabic: ثمرات الأسفار)Rayaz al Ons (Arabic: ریاض الانس)Exalted intentionA treatise on intentionAnnotation of “Kamel al-Ziyarat” (written by Ibn Quluyeh Qomi)Annotation of the two works of Sheikh Murteza Ansari: Makasib (The earnings) and Rasayel (The treatises)
Death: He fell ill in 1968 and travelled to Tehran for medical treatment where he died on 3 July 1970. His body was returned to Najaf for burial next to Amīr-al-moʾmenīn library that he had founded.