If you're in the market for a beginner's guide to krautrock and "kosmiche", then the first two volumes of Soul Jazz's Deutsche Elektronische Musik series should be essential listening. This third volume - the first for four years - should be on that list, too. It arguably goes deeper than its predecessors, combining cuts from pioneering electronic and art-rock bands like Neu!, Cluster and Popol Vuh with tracks from lesser-known artists such as Michael Bundt, Dronsz and Achim Reichel. Musically, it's also far more diverse than its predecessors, containing as much space-rock and proto-punk as early electronic experimentation and droning alternative rock. As ever, the accompanying sleeve notes from author David Nobbs expand on the story in brilliant detail.