Chilling, though it is set in the blazing heat of Saudi Arabia. The open ending left me hanging in the air, but that's fine. At the middle of the book I was, for some reason, convinced that I knew what was being hidden in the empty flat, but o/c that was a mistake.
The narrator and the protagonist clearly hate the Saudi society, and while I was wondering if this was politically correct to write at some time, it is backed up by masses of facts and experienced and doesn't leave a doubt that it is a country I will visit under no circumstances. Mantel herself has lived in Jeddah, where the novel takes place, and once named the day she left it the happiest day of her life.