To start research in German literature, take a look at scholarly handbooks, such as the ones linked below. These publications contain authoritative entries on German authors, themes in German literature, and historical contexts of the Germanic world. These references can also deliver insights and critical analysis, designed to help with in-depth literary studies and academic research.
These reference sources on German literature are organized by topics and authors, with entries that provide historical context, analysis, and bibliographic references to further your research.