Finished up Battleground. Since the title of the thread says spoilers, I'll assume that also applies for Battleground.
All in all, I thought that Battleground was a very good book, like a lot of basically two part books, the first was the set up and the second was the payoff. Fairly obviously, this sets up the series to go off in a somewhat different direction. From that standpoint there a similarities between this one and Changes.
I'll put spoiler around the next part