I've been looking for novels with ghosts in them, and this was one of the first that came up; I'm a few behind with David Mitchell, but given how much I've enjoyed all of his that I have read (Ghostwritten, number9dream, Cloud Atlas, Black Swan Green), it was a no-brainer to pick it up. It's a one-sitting read, Mitchell's knack for summoning characters is undimmed, and the creepiness and what-happens-next are only a bit undermined by the expositiony-ness of a lot of the evil twins' dialogue.
