Cytonic

You can tell that, by the time the third installment of the series rolled around, Sanderson's focus had really shifted to his other projects. I think he had a really great plot going, but then he decided to change the fundamental rules to the world (or reveal that the rules had always been different than they appeared). Disappointing, bur definitely still entertaining.

I love Sanderson's world building and uniqueness, but this one felt a little bit derivative. Maybe because he was less comfortable and felt constrained by the science fiction genre?

Age range: 11-16
There's something for a pretty big range of readers in this one. Definitely aimed more toward younger audiences than Sanderson's other books, but still may be too complex for younger readers.