Follow
@Indignation
1
https://archive.org/details/ChristophLuxenberg/Christoph%20Luxenberg/
2
https://archive.org/details/TheSyroAramaicReadingOfTheKoran
I believe those are the same book as in the Wikipedia article
https://en.wikipedia.org/wiki/The_Syro-Aramaic_Reading_of_the_Koran
@Indignation
Early Islam A Critical Reconstruction Based On Contemporary Sources ( Karl Heinz Ohlig)
Archive dot org
https://archive.org/details/early-islam-a-critical-reconstruction-based-on-contemporary-sources-karl-heinz-ohlig-z-lib.org