WOW this is a dark book, and I loved that about it. The sense of helplessness is overwhelming. 

I thought the 1500s timeline was incredibly strong, and the horror elements were fantastic. 

However, on finishing the book I realised that there isn’t that much actual tension in the modern day storyline. The only thing holding it for me was the idea that the two times would communicate with each other/have influence over the other, but that didn’t happen. Instead, it was a kid in hospital getting possessed, but that wasn’t massively tension filled because we pretty much knew why from the beginning, and a mum running around trying to find then returning a book. We don’t even see the interesting parts of that process. The past storyline was WAY more compelling.
 
And then coming to my major gripe of the story. Why, oh why, did the Book show images of each timeline to the other when nothing they did affected any of it?? If that hadn’t been included, I would have felt a lot happier with the ending. I was expecting a communication between the two times in some way, or their actions to influence the other’s story, but that never happened. Without them being shown images of each other, that expectation wouldn’t have been there, and I would have been happy with the only links being Edward possessing Erin and the cult/returning the book vibes in the present. The images did nothing but set me up with expectations that didn’t deliver. 
 
So, overall, I did have a good time reading this, it was really well written, the audiobook was fab, but the ending left me wanting.