*SPOILERS AHEAD*
So initially I gave this book 4 stars - mainly because of how gripped I was with the story. I will say, for me, 75% of the book was a page-turner, and as a London resident, I enjoyed the Tube storyline and was able to easily follow the references.
That said, the last 25% of the book let me down, and I felt like the story had been abandoned from its original premise.
Firstly, by the end, there were chapters written by 3 different perspectives, 1 of which was shoehorned in and to be honest, was probably not needed. Too much time was spent on Healy's perspective and his storyline with the psychologist was also unnecessary and hard to follow, even as someone who had read the previous book and understood his background. I'm here to read about Raker.
Second, the premise was finding Sam Wren, and so his fate in the book by the end was reduced to a mere paragraph. I was expecting a meeting with Sam and Raker, to talk about how he vanished and his connection to Smart etc, something that would provide closure, so the fact that the last mention of him was about 3 chapters before the end and referenced him to being in hospital, our only lasting connection to him being through a short conversation between Raker and Sam's wife Julia - well, that just didn't make sense to me.
Finally, through more plot twists, we find out the drama isn't over, and the villain is still on the loose, with the author leading the reader to believe our protagonist is dead at the end. Now since this was written in 2012 and I know there are subsequent novels in this series, I know that not to be true. Was Weaver at the end of his book deal at the time of sending this to the publishers? It just felt like a bad cliffhanger and weak ending to the story.
These points haven't put me off entirely, and I'll continue to read the Raker series, as I do enjoy them. In this case though, I felt Weaver had bitten off more than he could chew and he couldn't quite tie everything together, so he rushed it instead and hoped for the best.