i was partly disappointed with this one. the story flows, but i had the feeling that it could not fit in the volume. and i was right. the book clearly was ment to have a sequel, and i don't like this.
i think even books in a multivolume project should be self-contained. they may refer or anticipate previous or subsequent events, but should wrap up the story at the end. this is not so.
being that the first 2 ender's book are in my favourite, i expected a lot from this one, and i didn't find it. so it is a good artisan work, but surely not a masterpiece.