A short story to wrap up the Chaos Walking trilogy and featuring two of the minor characters, who I liked more than the protagonists. 
 A small group of explorers consisting of Lee and Wilf, and some of the colonists who arrived several months ago, travel north in a scout ship seeking out various communities of the Spackle, the indigenous humanoids. They are then attacked by a frightening and murderous creature and encounter a community of Spackle who live under the ice and who are self sufficient, not only in food etc, but in being cut off from the Land, the gestalt community in which the rest of the Spackle live. It then transpires that their reason for this isn't a nice one and it does beg the question of why they have to resort to this way of life when none of the other Spackle find it necessary. 
 The end scene with Viola videoing them to report something has happened - well, I expected that ever since reading the end of book 3 of the main trilogy. Anyway, not profound but quite a nice story.