What genre does the Short Story Index primarily index?

The Short Story Index primarily indexes anthologies of short stories. It serves as a valuable resource for locating short fiction, which is often compiled in collections or anthologies, making it a crucial tool for librarians, educators, and researchers interested in this genre. Anthologies include curated selections of short stories from various authors and are typically organized thematically or by criteria such as period or style, enabling easier access to a diverse range of narratives.

In contrast, the other options focus on different formats: biographies focus on individuals' life stories, periodicals pertain to magazines or journals that publish a variety of articles regularly, and textbooks present educational content in structured formats for learning particular subjects. None of these options align with the primary focus of the Short Story Index, which is dedicated specifically to short narratives found predominantly in anthologies.