This book was so mysterious, suspenseful, and ... a little creepy. I don't have much to say except, "wow." I think for Asher's first book, he did a fantastic job at playing with your emotions. The only thing I didn't like was that Hannah didn't reach out enough to people. She just expected them to know about her problems and what was going on in her life. Then she makes a bunch of tapes blaming everyone. Half of the people on the tapes probably didn't even know they were hurting her, but they had to go through that heart stopping, mind boggling (for lack of better words) experience. I felt bad for Clay, even though he sorta betrayed her as well. 
 This book will definitely make you think. I give it 4 stars. 
 Oh and I loved the creative story format, with both of their PoV's switching back and forth, although I did get some parts confused, forcing me to go back and read the page over again.