Wow. There's a huge following for this one on Goodreads (the number of people that want to read it is staggering). I would have given it a five were it a little longer and had it explored more of the persona interaction.

As things stand, it's a brilliant story based on an amazing concept, and of course Sanderson's left himself room to continue with things or to go back and show more of the history as necessary if he likes. I really enjoyed it. Chalk another one up for a Michael-powered recommendation!