There are many unresolved questions. Why, for instance, have both victims left their fortunes to an orphanage run by the English Lady Astair? And who is the beautiful "A.B.," whose signed photograph is found in the apparent suicide's apartment? Relying on his keen intuition, the eager sleuth plunges into an investigation that leads him across Europe, landing him at the deadly center of a terrorist conspiracy of worldwide proportions.

    There's no explanation: just a grainy image, a website address and a phone number. She takes it home to her family, who are convinced it's just someone who looks like Zoe. But the next day the advert shows a photo of a different woman, and another the day after that.Is it a mistake? A coincidence? Or is someone keeping track of every move they make...If you like Shari Lapena, Paula Hawkins, Rachel Abbott, B A Paris, Fiona Barton, Ruth Ware and CL Taylor, you'll love this gripping psychological thriller.

    And then -- the madness seized me. When I look back over the months I spent at Sunnyside, I wonder that I survived at all. As it is, I show the wear and tear of my harrowing experiences. I have turned very gray -- Liddy reminded me of it, only yesterday, by saying that a little bluing in the rinse-water would make my hair silvery, instead of a yellowish white. I hate to be reminded of unpleasant things and I snapped her off. "No," I said sharply, "I'm not going to use bluing at my time of life, or starch, either."