This book felt a little bit disjointed at times. Even though, technically, the group was still confined to one place (although much wider than the Maze), and with a specific goal in mind, it sometimes felt more like a collection of successive adventures than one big one, although that's probably on purpose. 
 Also, some things were very predictable, but it didn't spoil the fun. 
 I'm looking forward to seeing the conclusion to this trilogy, I hope it lives up to the rest.