I found this book rather delightful. It isn't literary brilliance that will be studied by academics for years to come, but it doesn't try to be. It is, however, a thoroughly engaging piece of fiction that will appeal to young adults and not-so-young adults alike. It is brimming with ideas, passionate, adventurous, and inspiring.
I know it's a cliché to say that you can't put it down, but with this book it is true - I read it in two sessions, because I just didn't want to stop.
(Conflict of interest - I know the author personally.)