The Doubt Factory by Paolo Bacigalupi
Alix is a normal teenager. Privileged life at an elite school, perfect family and a great group of friends. But could everything she thought she knew, be a lie? When a mysterious stranger starts pulling pranks and letting Alix know that she is the reason, a whole new world unfolds before her which makes her question her entire life so far.
The Doubt Factory is a book that started out as an exciting thriller and ended up blowing my mind. Despite the 496-page length, I flew through this book and at the same time, never wanted it to end. The mystery and thriller aspect to the story is what kept me gripped and I became attached to the main character - who was admittedly annoying at times (mainly towards the beginning) - wanting to know how everything would play out. To say any more about the plot would give a lot away, I feel this is one of those books you should go into blind in order to get the most out of it. I will say that the ending blew me away, however, and that I strongly urge you to read this amazing edge-of-your-seat thriller.