This book was quite slow for the first half. I think the plot had a lot of potential but ended up being quite predictable and I did guess all of the plot twists before they happened. Some of it seemed a little far fetched and unbelievable, but I enjoyed the book as a whole. I think the last 10% was a little dragged out and could’ve been shortened. 
I found myself being quite frustrated with the main character, Annie. For a start, given her interest in TV shows involving stalkers and murderers, I do not understand why she would even let a stranger into her home. She then proceeded to ignore multiple red flags and odd behaviour from the woman who claimed to know a lot more about Annie’s life than she should. After finding out how crazy the woman was, she even tried to defend her and reason with her and offer to help her! Any sane person would not so easily forgive or try to understand this woman after everything she caused. 
Overall, I did enjoy the book when I was reading it and found myself wanting to continue to the end.