REFUTING ARGUEMENTS MADE AGAINST THE QURAN SEE HERE AND HERE. Also see this debate on the Preservation of the Quran. For refuting the claim that the author of the Quran copied off the Bible and the Jewish/Christian Apocryphal sources see here and here.
This is an essay on what the Quran says about the Bible and where both the Quran and the Hadith say that the Bible has been corrupted. Here I provide clear Quranic evidence that shows the Bible has been corrupted.
The Preservation of the Quran (2010)
Ehteshaam gives evidence for the preservation of the Quran and that the Quran we have today is the same one as the one Prophet Muhammad (peace be upon him) used to recite.
Provides the timeline of when the Quranic Chapters were revealed and when.