What is the fine-grained topic of the following text: Over the years, we published books on important GDR authors such as Jurek Becker, Peter Hacks, Wolfgang Hilbig, Irmtraud Morgner, and Christa Wolf, and on topics such as Science Fiction Literature in East Germany, Searching for a New German Identity, Protokolliteratur in der DDR (Protocol Literature in the GDR), Heinrich von Kleist in der Literatur der DDR (Heinrich von Kleist in GDR Literature), and Unvollendete Trauerarbeit in der DDR-Literatur (The Unfinished Process of Grieving in GDR Literature). Only return the topic.
GDR (East German) Literature and Authors