Really good. It's one of the longest if not the longest psy-changeling novel but I still wanted more. The way the Arrows started to build their society was so fascinating and I liked how all these different groups were trying to work together. There were old characters and amazing new ones and while some of the old villains were still lurking around they had a terrifying new foe, who wasn't picky while choosing its targets.
This is definitely my favourite paranormal series.