The group was founded by a group of individuals who shared similar interests in sadomasochism, a paraphilia that involves deriving pleasure from inflicting or receiving pain. The group's name, "Der Sadisten Zirkel 17," was likely chosen to reflect its focus on sadistic practices and to distinguish itself from other similar groups.

Der Sadisten Zirkel 17 Wie eine geheime Gruppe Vertrauen missbrauchte, Gewalt verherrlichte und das Leben ihrer Opfer zerstörte

by Karl Berg, there is no widely recognized thriller series with that exact "Zirkel" (Circle) branding reaching a 17th installment.

Since you've asked to "generate a text," here is a dark, atmospheric opening for a fictional story under that title: Der Sadisten Zirkel 17: Die Letzte Einladung

Der Sadisten Zirkel 17 does not shy away from the trademarks that made the series infamous. However, it introduces more contemporary psychological elements that reflect modern anxieties.

As with any media carrying this title, Der Sadisten Zirkel 17 has faced its share of scrutiny. In many regions, the series remains highly restricted or relegated to "adults only" collector circles.

: The sci-fi film by Bong Joon-ho starring Robert Pattinson, which deals with clones called "expendables".