---Review containing spoilers--- 
 It started as creepily epic like you knew there was something wrong with this couple. Kudos to the author's writing skills for that. But after a while, the book became frustrating particularly the heroine. Idk if the author was trying to make her look dumb or make the male character look the smartest or just to drag the story but lbr Grace got sooo many opportunities to get out of this or at least try man. She did try but not enough. Like when her parents freaking came or when she actually managed to get hold of the police or the numerous times she met their friends Esther Diana etc or Janice!. All those times she could have told them Jack isn't the man who she thought and that she wants a divorce and she doesn't want to live with him anymore. She could have just left the house then. She can't be forced to live with someone again her will! Even Millie had more guts and was smarter than her! Maybe she was under the effect of his abuse but even at start she could have but didn't. Jack's threat to send Millie to the asylum doesn't count since Grace is also the legal guardian and her permission is necessary. Also his excuse of saying that Grace is crazy was such bullshit; the hotel man testimonial or the random doctor don't prove shit. 
 Anyway having said all this, I still couldn't put the thing down. It's like I had to finish it I was dying to know how it all ends and damn did I love the ending! I was so surprised. It was creepily epic just as the start was. And though I would have loved everyone to know what a psychopath Jack is, this was what he deserved the most! Finally I was happy with Grace!:) special mention to Esther, woman is freaking awesome! That last scene between her and Grace gave me the chills and goosebumps and made me tear up too. I had already decided to rate the book 3 stars but I just had to increase it to 4 after that ending. The book had its flaws like I ranted lol but it's still a gripping, thrilling and captivating one!