This is definitely the best book of the series so far. I have found previously that a lot of the characters are one-dimensional and end up just getting on my nerves (only the ones from the Hollow, the Krasians are wonderfully complex and detailed), but this time they were far more interesting and not so simple. 
 It delves deeper into the lives of some of the Krasians, which is always my favourite part of these books, and some good new characters are introduced. The book ends on a massive cliff-hanger, which means it's going to be really hard to wait the next couple of years until the next (and hopefully last) book is released. 
 I really want to know how this ends!