Gone Girl by Gillian Flynn

Very slow start but after the halfway point this gets better.  It is a thriller about a couple who are struggling with their relationship when the wife disappears under suspicious circumstances.  There is a twist about half way through and it is after that that the book hugely improves – the plot becomes a lot more interesting and the characters more complex (albeit not especially realistic).   A fairly good thriller but on balance it is not worth the slog through the first half.