This is book 3 of the "Black Tide Rising" series.

This note contains spoilers for the book.

Third of his zombie series. I'm reading them out of order; this happened to be on the shelf at the library when I looked. But in fact I'm not aware of anything that may have happened in the missing book; I wonder how I'll feel about that when I read it?

They're a long way from starting to rebuild civilization, but they're at least thinking about it. And they've just started another push to manufacture more vaccine (to let the people on the submarines come out, basically). Still basically scavenging rather than making anything, though. Percival Stevens built more on his first day standed on Ganymede than these people do in months.

They're starting to do partial clearances on land; at least islands. And realizing that it's easier than cruise ships. There's also more chance for survivors, at this point.

In a weird bit, they get called over to England to rescue the king. Not a total waste since he's a trained helicopter pilot, and the security forces with him are good.

Faith realizes that at this point she has something like ten times the combat experience of the marine veterans they're bringing in. It's a target-rich world. And her parents continue to worry about the effect on everybody, including their daughters, of this environment, but it's the only one they've got.