I honestly love books like this one. The story felt really original, it was very easy to doubt whether the protagonist was sick and delusional or if the paranormal occurrences were real which kept me guessing for a long time while reading the book. I had an easy time imagining what was happening and the pace of the book, although at times confusing due to the confusión in the mind of Carly/Kaitlyn, was optimal.
I want another story like this! Great read, even though I never felt really scared while reading.