This was an interesting take on various “surviving the apocalypse” scenarios. A “something happened, now there are only seven people alive in the world... maybe” story. I enjoyed this more than I might have otherwise because it takes place in Boston/Cambridge. Well-written characters, somewhat unsatisfying when you learn what the something is that happened. I liked the problem-solving nature of the early parts of this book a lot and have now gone on to read a few more of his books.