Steiner believed in something called the Akashic Records which is supposed to be a kind of comprehensive non-physical library of information which can be accessed by individuals with certain spiritual abilities.
Levi Dowling, the author of Aquarian Gospel of Jesus the Christ claimed to have gotten the information for his gospel from the Akashic records. And according to Hakim Bey (Peter Lamborn Wilson), The Aquarian Gospel of Jesus the Christ was one of the sources (in the "ordinary" non-mystical sense) of Noble Drew Ali's Circle Seven Koran.
It occurs to me that in the Quran (and hadith) there are many different references to a Book, or the Pen, or writing (e.g. [22.70] Do you not know that Allah knows what is in the heaven and the earth? Surely this is in a book; surely this is easy to Allah.) and that possibly some of these references are consistent with the concept of the Akashic records. The Quran tends to evoke the anthropomorphic image of angels following us with pieces of paper (made from trees?) writing down what we do (in what language?) with ball-point pens. But perhaps that concrete language is really refering to something different like the Akashic records? Allahu alim.