@Ben Cox you inspired me to try and complete the 1-5 vol. collection. Number 5 arrived this morning. Found it on eBay. It was sold as the English version, but it isn't, it's German. Not sure it exists, so I don't mind. Vol. 1 and the 1-5 photo index are new since they were fairly cheap. The rest are secondhand and also very reasonable, even Vol. 4 which is usually stupidly expensive. There is a vol. 6, but again, I don't think an English version was ever printed.
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