Ask HN: Book recommendations for learning about 19th century German history

I was interested in learning more about this period of history and was hoping I could receive some recommendations. I've looked at Biographies of Bismarck since he seems like a key figure of this period but there are quite a few different ones but I was hoping someone could recommend a good place to start.

This is not for anything academic just a bit of nighttime reading since I'm a bit burnt out on science fiction.

Thanks!