Preservation of the Quran

I'm currently trying to read the Quran.
I have heard from muslims that the Quran has been "perfectly preserved and no a single word has changed since the prophet wrote it"

what is the academic position on this?

While studying what scholars say about the Bible, they appky the historical-critical method to the Bible.

Is it the case that the Quran will stand the test of the historical critical method?

Would you recommend some academic articles to read trough it (both in favor and agaisnt)

Tyou guys!