See also 宮部 みゆき (Japanese language profile) and 宮部美幸 (Chinese language profile).
Miyuki Miyabe (宮部みゆき Miyabe Miyuki) is a popular contemporary Japanese author active in a number of genres including science fiction, mystery fiction, historical fiction, social commentary, and juvenile fiction. Miyabe started writing novels at the age of 23. She has been a prolific writer, publishing dozens of novels and winning many major literary prizes, including the Yamamoto Shūgorō Prize in 1993 for Kasha and the Naoki Prize in 1998 for Riyū [The Reason] (理由). A Japanese film adaptation of Riyû, directed by Nobuhiko Obayashi, was released in 2004.
I had the feeling that the second part of "Brave Story" would be a letdown after the amazing first, and in particular because I knew it would be based in the fantasy world (if, after the 100-page-long introduction to the world by a random (back then) character didn't mean the story was going to stay in 'Vision' world, well, Miyabe Miyuki was pulling the reader's legs (which would have made for some amazing surprising plot development)).
And yes, the story suffers in Vision world. As with some of those fantasy Japanese stories (yes, Yusuke Kishi, I AM LOOKING AT YOU), it seems we need some drawings to stop the writers from writing too much and hitting us in the head for too long with needless exposition. Here is where manga may have the upper hand. A couple of drawings to show us the world, a couple of chapters to explain some background, and, voila!
So, we left Wataru just arrived to Vision. To bring destruction and pain! Because pretty soon everything seems start to go sour for our hero, being imprisoned and on the death row. Don't worry, because that is not the last of his worries, as he keeps jumping from the frying pan to the fire, and making a mess of his time in Vision. However, the plot developments that happen to him seem to McGuffin'ish for the sake of the story, and many of the situations, too forced (do you want an example of this in English fantasy?; just read the first of the "Wheel of Time" books, when the characters are 'forced' to enter an old city in ruins with an old and full of hate and rage 'danger' within it; that is the type of oh-really-did-we-enter-into-a-dangerous-place? that happens here; too American horror movies with teenagers type). It is a pity, because the world is full of wonder, but is at the service of the plot driven carrots, and can't really overcome some unbelievably strained situations (yep, yep, Wataru and Mitsuru play a role in why things happen the way they happen in Vision…, sure, Miyabe, come up with another excuse, please; or develop it better).
The best: we keep enjoying our time with this very interesting characters; the political/religious elements
The worst: it pales in comparison to the first one
If you want something like it: start with the first, for starters; Harry Potter or the Hunger Games, even if very different, also touch on the anger/fear, etc of growing up