The appearance of any novel by Ruth Rendell is a cause for celebration. But I am particularly pleased by A Sleeping Life … because it sees the return of Chief Inspector Wexford, investigating, this time, the unfathomable death of an apparently respectable, well-heeled, middle-aged woman who appears, once the investigation has begun, to have had no past and, indeed, no existence. The resolution is a little disappointing and rather obvious (the same trick was used years ago by Josephine Tey in To Love ...