I read this during a day of traveling through multiple airports, layovers and flights. 
I found the novel had enough tension for me to keep reading, wanting to solve the questions I had relating to the dynamics of the characters. However, I finished the novel with more questions - all was not as it seemed. Which, I believe ... may be the point. 

I felt like the last act was rushed, which was unfortunate because that featured plot was my favorite. 
I purchased the book and am planning on donating it. 

If you feel compelled, another read-through of the book could be helpful ... I don't plan on reading it again so I will be donating my copy ... If I feel compelled to read it again, I'll reach out to my local library.