The story is told in alternating chapters between Sarah and Kelly's points of view,sometimes in these types of books one of the characters chapters can be more interesting than the others but in this book both characters chapters are interesting and intriguing for different reasons.Sarah's chapters are heart stopping at times as she fights to regain consciousness and her memories slowly return plus adding to the tension is the mysterious stranger that in some of her brief moments of consciousness Sarah can sense in her room at night,what does the person want?.Kelly's chapters are quite funny at times,writing a story from the point of view of a teenager can't be easy but Kelly's character is very believable.