It must be a nightmare to come home after leaving your baby for the first time, to find that the infant you return to is not the one you left. Even more so when you cannot convince those around you, who put your story down to post-natal depression. This is the starting point for this well-written psychological thriller. It is written in two voices, that of the mother, and of one of the detectives who is sent to investigate the mystery at "The Elms", (the home of Alice's mother-in-law, and devoted grandmother of 'little face'). This 'dual voice' actually works well and the pages turn swiftly. This is a gripping read.
The ultimate resolution is perhaps slightly predictable, although it is always easier to set up mysteries than to resolve them satisfactorily. However, the characters are sufficiently believable, and the steps towards reaching the conclusion are sufficiently intricate to make this an enjoyable, if slightly disturbing read. The scenes played out between Alice and her husband are particularly chilling. I will certainly look out for Sophie Hannah's next novel. I wonder, incidentally, if she will give the detectives in this novel a second outing, as there is certainly scope to develop their characters further!