Since you specified "useful paper," I'll assume you're looking for a related to the Ruby Red book series (literary analysis) or its adaptations.
“Time, Gender, and Identity in Kerstin Gier’s Ruby Red Trilogy” ruby red series
The "Ruby Red" series you're asking about could refer to either: Since you specified "useful paper," I'll assume you're
The series consists of three main novels, originally published in German and translated into over 27 languages. Since you specified "useful paper
Directed by Felix Fuchssteiner and starring Maria Ehrich as Gwyneth and Jannis Niewöhner as Gideon.