This is a terrific, well-controlled, extremely sinister novel from good writer who just keeps getting better and better. Set in an alternative 1979, in Britain, it follows thirteen year old triplets who are the last residents of a care home at which they are required to take daily medicine to protect them from a mysterious illness, and are promised that they will eventually move to a big house in Margate at which their life will be perfect. The novel gradually reveals its secrets, and later in the book there are shocking revelations. This is a masterpiece of suspenseful writing, and a profound exploration of who is valued in society. Just brilliant.