Strands of Sorrow (Black Tide Rising)

Strands of Sorrow (Black Tide Rising) - John Ringo A much better finale to the series than the previous book would have been. Brilliant fun to read, especially the last part.

Can't really say much without spoiling it, but they find some people in D.C who aren't...let's say they're not entirely up to date with the status quo with regard to the shambling undead (who are neither shambling nor undead according to the canon, but fuck it, who cares anyway?)