Non-Muslims always did their research work on Islam, Hinduism, Jewish, buddhism, etc. but the major research and discoveries are on the Holy Quran and on the branches of religions in Islam. Many Non-Muslim peoples have written several articles on Holy Quran, Islam and on Sunni-Shia.
(Psychologist from Netherlands)
Mr.Vander discovers about the effect of reading the Holy Quran and repeating the word ALLAH both on patients and on normal persons.
Read his discovery about the effect of reading Holy Quran & Allah
(Professor at Oxford - England)
"The Succession to Muhammad (P.B.U.H)" by Wilferd Madelung, Professor of Arabic at Oxford University, examines the course of events from 632 and the death of Muhammad(P.B.U.H) through the rise of the Umayyads and rehabilitates. Who succeeded Muhammad (P.B.U.H) and how He become successful.
Read the article written by him
Read some more information of "Wilferd Ferdinand Madelung"
Non-Muslims View Of Muhammad (P.B.U.H)
(Non-Islamic view of the last Prophet)
There are several peoples which they have written many articles with praised of last Prophet(saw). It is very difficult to list all of them but I have listed some of the famous personalities names with their quotes.
Read Non-Muslims views of Muhammad (P.B.U.H)
Non-Muslims View Of Ali (A.S.)
(Non-Islamic view of first Imam)
There are several peoples which they have written many articles with praised of Imam Ali (a.s.). It is very difficult to list all of them but I have listed some of the famous personalities names with their quotes.
Read Non-Muslims views of Ali (a.s.)
Michael H. Hart
(Jewish author & professor - USA)
Michael H. Hart in his book "The 100", He claims Muhammad (P.B.U.H) the first and was the most influential person in history due to his supreme success on both the religious and secular levels.
Read some more information of "Michael H. Hart"
"The 100" A Ranking of the Most Influential Persons in History from wikipedia.org
George Jordac NEW
(Christian researcher - Lebanon)
The book "The voice of human justice" (first Arabic edition 1956) was written by a renowned Christian and a prominent writer, George Jordac. In this book he examines the Biography of Imam Ali (a.s.) in the various aspects of the personality of the Caliph of Islam, from a unique different perspective of an 'outside' admirer. An extremely well-written book presenting a refreshing analysis of Hazrat Ali's conduct and behaviour at various points in His life.
Read some of his quotes from his book