Another book that ended with a cliffhanger, which I'm not enjoying at this time. This is the second book I've read recently that does so. The story does drag a bit while they are in the cave/station, but otherwise I enjoyed it. My one complaint is SPOILER!! [it took them forever to reach the outside when they went through the tunnels and it seemed it took the baddies only a day even with self-locking/closing doors and the last door being extremely thick. How can the baddies be able to easily explode through doors that thick in mere minutes? For as long as the journey took Ky and the survivors (way too long in my opinion), the ease with which the villains went through them like tissue paper was unrealistic.