FYI....
Cat Stevens (or Yusef Islam) is actually mentioned in the Satanic Verses by Salman Rushdie, but not by name; but it's obvious who he's talking about. He talks about "the young Englishman (or foreigner) with the beautiful voice (who converted to Islam)" ; and how he was doing radio shows for a radical Islamic radio station. Sorry I don't remember more; it's been ten years, probably, since I read the book.

I always enjoyed his music, too...