Guide me a single book in relation to history that is least unbiased and give a proper view of all the sects. Secondly, what is your opinion about books of Tabari and Ibn e Khuldun? My second question is that it is said very often that there are more than three hundred narratives in favor or praise of Hazrat Ali but I have studied Quran according to my capacity which does not show anything like until and unless you ponder upon the commentary which is often biased by the sectarian views and those verses can be fitted to anybody not only to Hazrat Ali. What would you suggest about this matter? Whose commentary is reliable?