I bought The Unwanteds last year after having loved Lisa McMann's other books, Cryer's Cross and Dead To You. The cover was beautiful, the synopsis was interesting and there were even critics raving on how the book was like Harry Potter meets The Hunger Games. I figured that with all those credentials, The Unwanteds ought to be a pretty awesome read, but it seems I was horribly, dreadfully wrong.
Narration
The omniscient and omnipresent third person narration is awful. That kind of narration has to be done properly if it's not to fall in one or more of the various writing potholes that come with it, and Lisa McMann didn't achieve that. Instead, she forsakes dialogue and uses the narrator to tell you how all of the characters feel, what they're thinking and what their plans for the future are. This generates a complete lack of suspense and also makes the characters uninteresting, since you get to know them through information that is blatantly hurled at you by the narrator.
Characters
The characters in The Unwanteds are a complete mess. They're rough carbon copies of characters in other series, except the ones in this book are dense, uninteresting, or both. They're all extremely childish and dumb, and before someone argues that it's a children's book, go read a Series of Unfortunate Events, or Harry Potter, or The Golden Compass. Those are children's books, and people in them aren't idiotic.
On Writing For Children
The Unwanteds is, painfully, the kind of middle grade book that treats the reader as if he or she were daft. There are no plot twists that can't be seen kilometres away and that aren't manhandled into the story so they can hit you right in the face. If character's intentions aren't clear enough, they either explain themselves verbally, or have the narrator give their reasons - or both. Predicate nominatives are barely used, which results in the kind of sentence that goes like: "Alex tried his best to climb the mountain, but the mountain was too steep." Normally, that should be phrased "Alex tried his best to climb the mountain, but it was too steep", but Lisa McMann wants you to be sure of what she means, lest you get confused and somehow arrive on the conclusion that she's describing Alex as steep, whatever that means.
I actually ended up skimming the latter half of the book (I don't know how other people skim, but I just read dialogue and enough description to understand what's going on, barely), and I loathe skimming because it's a drastic last resort, but it was either that or DNF this book, and that beautiful cover deserved better.
Main point is, The Unwanteds is a terrible book that wastes some actually good ideas and then always acts on the assumption that its reader is dumb as a box of rocks. It's neither charming and magical like Harry Potter nor interesting as The Hunger Games, and I wouldn't recommend it for children,teenagers or adults.