This is one long battle sequence, hence the name. I found it very boring to read and ended up skimming most of the book. 

Originally, Peace Talks and Battle Ground were one book. I would have preferred that. Cut a few bits out and make the narrative tighter and it would have worked. On its own, Battle Ground is a slog. 

Because of the grand scale of things, many character details and plots got lost. Thomas was hardly mentioned for example. 

The Murphy thing was very stupid and unnecessary. Harry didn't need more reason to fight. It was cheap. 

It's still a well written book but I've not been enjoying this series as much. The last few books were very hard to read and don't have the re-readability of the early books.