I saw a post a while back where someone mentioned that the Thirty Years War influences German language fantasy novels in much the same way that The War of the Roses influenced Game of Thrones.
Which got me looking for a book influenced by the Thirty Years War. It could be a fantasy novel, or historic fiction. It could be set in the period, or just loosely riffing off the themes.
It does need to be available in English though.
by Aetylus