All the things I love, wrapped up in one perfect novel!

This book seems to have it all....a post-apocalyptic society, a looming exterior threat, and now a murder that has to be solved to save what's left of the world! If there were any copies left, I'd definitely have used my points to claim one. I'd love to read about this small group of survivors living in their (previously) idyllic society. I'd love to try to solve the murder along with them, and try to figure out what's going on with the memory loss related to that event. I'm sure I'd love everything about this story, and hope I'm one of the lucky winners!