In my opinion I wouldn't call this a psychological thriller, that is until the last bit. But still I wouldn't go as far as calling it thriller. Psychological, yes I see the point of that but no the thriller aspect. 
 Nonetheless I would admit the fact that this book deserves it's position in the best psychological thriller (though once again I do not know I should put this in that category) ever to be written. I do not know the full reason why I loved this book but still loved it, I did. 
 The story is about Joe and his obsession with a girl who entered his bookstore, Beck. To anyone it can be seen that Joe has "slight" (ahem ahem) stalker tendencies and the story is basically about how Joe notices Beck and tries his level best to get her to notice him. The story is actually captivating (once again not sure if that is the word I would use there) and made me not want to keep it down at any moment. 
 The characters were so diverse. We could see different characters from the snobbish Upper East Side society. For some reason I got heavy Gossip Girl feels too. There is no character that I liked and no character that I didn't like either. For me all the characters were fun to read, specially Joe with his complex yet very simple mindset and character. Beck was for me one of the best characters. She was so awfully flawed that it was actually pretty interesting to read about her. Also for some reason I never sympathized with her. Even at the end, I just couldn't feel bad for her. She made Joe who he was through out the book and I liked her for that. If there was no Beck there would be no story. For many Beck was just an annoying character but for me more than Joe himself I liked Beck and like I mentioned previously I disliked her equally. But not the deep grudge dislike, but I know for a fact if I did meet a Beck in my life I would instantly dislike her. 
 When considering the story line, there is no other word than all-consuming to it. I couldn't literally keep my book down after I got invested in it and I think I read the whole thing through just three sittings. For me, this was definitely better than the Girl on The Train, no offense to anyone. 
 This was without doubt one of the best psychological books I've read, not the type to make you rack your brains but the type to make you very interested in it. 
 Anyway please forgive my rambling as I have not written a review in a while due to my studies and y touch is slowly vanishing.