A psychological thriller. I have read about the author and have seen some rave reviews. The writing is indeed taut and as good as there is. The girl who cannot remember what really happened. The police enquiry lines. The murders which have piled up. The circumstantial evidence for anyone of the dozen people who can be the suspects.

But the ending was not very good. Introducing new facts and figures to finish off the story? Never liked that kind of an ending.