In novella 4 of the series, the group are more suspicious, having lost one member to the cruelty of someone who appeared to be a Good Samaritan but was really a servant of the wraiths. The stakes have been raised given the possibility that people can be working for them without a tell-tale dark jagged mark on their faces.
Hence, when they encounter a man in another town who has set up a base at a cinema they are initially very suspicious, especially since he at first menaces them with a gun, and Stone in particular is downright hostile to him. Eventually he proves he isn't one of "them" and gives them news of the City of Light, a haven which they have heard mentioned earlier, but what initially seems to be a safe place in the cinema is soon breached by the menace of the wraiths. With Mia going into labour, Grady has to drive her in a snow mobile to the place which their host has pictured on a roughly drawn map and survive perils not only en route but in the City itself.
The threat of the wraiths continues to evolve, as they seemingly develop stronger powers as time goes on. Their ability to read people's deepest fears and traumas and then to feed off the negative emotions created by playing to those makes them a growing menace, especially since they appear to be developing resistance to light.
I've always found Grady a bit irritating, but he was especially so in this instalment. Whenever the wraiths appear, he always freezes up. Mia, in advanced labour, has to slap him across the face to snap him out of it at one point, and he later causes an accident because of his inability to deal with them. I can understand a person behaving like this initially, but when he has had umpteen encounters with the creatures and knows they are just impersonating various people, it becomes a bit annoying. Also irritating is the rather laboured banter that goes on between the group members, especially Grady and Stone, which isn't actually funny at all.
One positive aspect is that I have warmed more to Mia as the books have gone on as she is often decisive and takes action, or jolts others out of their paralysis. The situation in which the group finds itself at the end offers the possibility of new kinds of conflict which is promising, as up to now they have only encountered individuals along the way and never had to fit in with a community. On balance, I am awarding this 3 stars.