Sean is still crazy and talking to himself and resolved to staying that way and living a peaceful life with his imaginary Georgia... after he avenges her death of course. It's not a spoiler to say Georgia's back. It would be a spoiler to say how she's back. But just know that when you do find out how, that won't even be the disturbing part. That's yet to come. This whole series is fun. They come up against impossible odds, and they shoot down zombies. Plus- my favorite- strong female characters. What more could you ask for in a story?