The act of reading always involves identification: with the story, the characters, the author’s intentions. Renée Knight takes this concept and pushes it to dangerous extremes in her psychological thriller Disclaimer (Doubleday, £12.99, pp. 304, Spectator Bookshop, £11.69). Catherine Ravenscroft finds a novel in her house which she doesn’t remember buying, and which seems to be telling the story of her own life.