Question about the ending (SPOILERS)
Are we to assume that Cal sent the text to the professor? And was that him in the video along with the other two thugs that beat the professor's lover? It seem that that is the case. If so, I think it would have been better for him not to reveal that he was a part of that if he was going to leave and move away. That seems like such a kick in the face to the professor, especially after he'd just helped Cal thru Cal's nightmare. Truly sad.
On another note, I would have liked to see Cal and Jonno get together. A sequel would be nice.