Al Fadi explains why the common belief by muslims that the Quran is perfectly preserved is not true.  He goes through the studies of the two oldest manuscripts(Paris, Sanaa).  He talks about the variations between the two manuscripts and the modern 1924 edition of the Quran.  He concludes that the Quran as we know it today is in no way possible perfect and complete; but went through a process of modification and the cannonization of theQuran was done in phases.