The format of this book is creative (it's an exchange of online posts, text messages, email messages, etc.), but wow, the story is intense. Ever wonder what would happen if you made an online friend and she turned out, literally, to be psychotic? That happens in this book. Ever wonder what would happen if you got so caught up in an online friendship that it started to interfere with your real life? That happens, too. It is one wild ride, but it explores questions like these that probably a lot of us have in the back of our minds. I especially liked the sensitive, realistic way that the character with psychotic disorder is portrayed--a reminder that people with mental illnesses are, first and foremost, still people.