The author can't write people very well and if you're OK with that it's a series with some great concepts. It was interesting to see how a Chinese author thought the US would act in a global emergency in Dark Forest, it was the reverse of a US author assuming everyone would act like the US.

I was pretty annoyed with the wallbreakers concept as it played out because the idea that you'd have some intricate plan involving details about how things would play out in several hundred years and then when someone guesses it you just say "Whelp, guess I'll die" is kind of absurd. Surely you'd just invest in tons of technological development first, see how things shake out, and if someone guesses your plan, abandon it for a new one? Same as in the first book, "Physics is weird, guess I'll die" just seemed bizarre to me.