It’s a main stream franchise, it’s all over the place.
Found plenty releases on private German trackers (e.g. Robert.Jordan.-.Das.Rad.der.Zeit.-.01.-.37.Komplett.128kbit.MP3 about 32 GiB) or Usenet (House-of-Usenet board also 1 to 37 or German indexer scenenzbs.com Robert Jordan - Das Rad der Zeit - Band 01 - Drohende Schatten) or file hoster boards (like boerse DOT cx).