this is great - a real mystery - took me ages to figure it out.

Loaned to Mum who will release it when read

This is the first Lisa Jewell book I've read but I'll certainly read more. I normally find books that dart around in time confusing, but this was easy to follow.
At the beginning, it seemed obvious who the mysterious character with memory loss was. However, his identity and background gradually became much less obvious.
The most satisfying part was how the author drew the strands of the story together. There were no "where did she go" or "why did he do that" moments.