Oh, man. This book was pretty terrible. And I read it all the way to the end on the off-chance that it would stop being terrible, but the terribleness continued. This book has extremely poor character development, a plot that moves more awkwardly than a teenager learning to drive a stick shift, and is riddled with inconsistencies. Also, it just tried way too hard to be cool and failed utterly.
So first, the characters. The main character, of course, is Leven Thumps. Everything interesting about him begins and ends with his name. He's an orphan adopted by a distant relative who cares nothing for him and he lives a life of slight deprivation and no love (sound familiar?). He has a small patch of white in his hair which is never properly explained and serves no function at all the book. For the whole of his fourteen years of life, he has been completely average and unexceptional until, during a bullying incident, he discovers he can call down thunder. Just by thinking about it. And then later, it is discovered that he can manipulate people by looking into the future and making them decide to give him money, food, or whatever else he happens to need. He can't control his powers, meaning he can't necessarily choose to use them whenever he wants (not for lack of trying) but nevertheless, the powers pop up and he can use them without any teaching whatsoever. And he doesn't even question these abilities. He just accepts them as normal and moves on with life. Also, he's really quick to give up on his quest to save Foo when attacked by his nemesis's shadows, who creep into his sleeping brain and sow seeds of self-doubt. And honestly, he should doubt himself because, though there is nothing remotely special about him and he can't even control the powers he seemed to have acquired through osmosis, he is still a boring and completely useless character. But, for some reason, he is the only person who can save Foo. Whatever.
The same problem exists with Leven's female counterpart, Winter. She was actually from Foo and, through an unexplained process, was able to become a newborn again and was traded with a different newborn so that she could grow up and help Leven return to Foo. There was nothing special about her until her teacher bullied her and she could suddenly turn things to ice. And it wasn't like this was a slow progression of a power that she then carefully honed into strength, she was just capable of turning a whole classroom to ice and then having strong ice powers through the whole rest of the book, once again just by thinking about it. And she is also raised by a woman who does not love her and she dresses in cast-off clothing, etc., etc., etc. There is no growth in either Winter or Leven. They can just suddenly do what they can do and that's that.
Clover is a cat-like creature who is called a sycophant for reasons unknown, as he seems to have no ulterior motives in helping Leven get back to Foo. Sometimes he's cute, sometimes he's annoying, but I can't see any real purpose to him. He was there to explain to Leven and Winter about what Foo was and why it was in danger, but it takes a third of the book to get there and by the time he finally did explain, I was past caring. The only character I really enjoyed was Geth, but only because his circumstances were absurd. Geth is a walking, talking, eternally optimistic toothpick. The villain, Sabine, apart from having the least villainous name I could think of, had basically no back story. And every time he said "I" or "me" the words were italicized...for no reason I could see at all.
The plot is horrible and hardly ever moves. This is a long book (for a middle grade) in which next to nothing actually happens. I felt like the author was like, "Hm, let's throw in this scene of mortal peril for absolutely no reason. It won't advance the plot, but boy those dirt creatures are cool!" Also, the characters did a lot of "waiting on fate". Honestly, whenever they encountered an impossible situation, Geth would just remind everyone that fate would help and so everyone just kind of waited around until fate stepped in. So there's no real suspense, even in the mortal peril instances, because the reader has been beaten over the head with knows nothing bad can actually happen because fate will solve everything. But sometimes fate handles things in a way that is just completely implausible, even for a fantasy novel. When Leven and crew run out of gas in their stolen convertible in the middle of the Atlantic Ocean, it's cool; Leven just jury-rigged the convertible top into a sail and made the wind blow them all the way to the French coast (because England doesn't exist in this book? And apparently physics doesn't, either...)
This book doesn't seem to be consistent in its rules at all. The biggest example I can offer is that when Sabine finds the magical gateway from Foo to the real world (because of a dream he saw a human having in the real world which is never described, but which gave him the sudden burst of inspiration he'd been lacking for fourteen-plus years) and crosses into reality, he is no longer able to use his powers. But Winter, who was also a resident of Foo, has no problem using hers the entirety of the book. The world building is sketchy at best; the only real thing we know about Foo is that it exists so that humans can hope and dream (a lot like Fantastica in The Neverending Story, a much, much better book than this one...). People get to Foo only when the circumstances are perfect and only when standing at an intersection that doesn't exactly line up properly.
And that's the final way this book went wrong for: it just tried way too hard to be like other, better books, and failed miserably. I think it was trying to capture the whimsy of Dahl. For example, Leven's half-aunt worked at a napkin factory where she folded napkins by hand. Kind of like Charlie's dad screwing the lids on tubes of toothpaste in Charlie and the Chocolate Factory. But the author just made it absurd instead of whimsical, what with the horrid aunt and her carpal tunnel and the fact that the only reason she had a job was because rich people liked being able to say they could afford buying napkins that were hand-folded. While Charlie's dad's job only reinforced the good-natured humility of the Bucket family, Leven's aunt's job served no purpose for either character development or plot. The same goes for Winter's Matilda-esque mother who thought she was the greatest thing since sliced bread and consistently belittled Winter. Not to mention a lot of the chapter titles were tweaked titles of old songs. For example, "I Can See Clearly Now My Head is Gnawed" and "We Felt the Earth Squirm Under our Feet". Seriously, just stop already.
So, yeah, I'm going to guess that Foo eventually gets destroyed at some point in this series because there is
absolutely no hope
that I would continue on with this.