https://archive.org/details/der-schwarze-schleier-nathaniel-hawthorne
https://archive.org/details/die-welt-jetzt-neu-denken-wird-die-zukunft-mehr-als-konsum-sternstunde-philosophie-srf-kultur
https://archive.org/details/utopie-studio-den-wohlstand-retten-maja-gopel-und-richard-david-precht