This was ok. Really think the series would benefit from some resolution to the personal life of the main character. Doesn't need everything sorted but stretching more or less the same issues out over what is now 5 books is getting a bit much to be honest. Also the coincidences of how some of the recurring characters are thrown back together are becoming a bit too thin.
As for the plot of this book, well sort of revealed itself a little too early on and doesn't really surprise at all.