http://frau-sabienes.de/liebe-dich-selbst/
I found the mention of Chuck Spezzano to be of interest. As I translate it, Frau Sabienes says Spezzano was once in vogue among the esoteric set, but is no longer. That would be consistent with the data we have collected indicating Psychology of Vision is a sinking boat.
Zurhorst's book has been mentioned before on our blog, including this link:
http://psychologyofvision.blogspot.com/2015/12/love-yourself-and-it-doesnt-matter-who.html