Every You, Every Me by David Leviathan

"Evan is alone.
His best only friend, Ariel, is gone.
Evan is feels responsible.
And in her wake, Evan is left with nothing a conscience and never-ending insomnia.
But then, while walking to school one morning, Evan finds an envelope in his path. Inside is a photograph. Of nothing. Except the spot where he is standing.
The next day, Evan finds another envelope. In the exact same spot as before. Inside is another photograph. Of him.
Evan's not sure what to think. Is Ariel back? Are the photographs her way of tormenting him for reminding him of what he did to her? Or worse--has someone else found out what he did and is toying with him as punishment? Either way, he will not be able to sleeprest until he finds out who is responsible.
As the cryptic photos keep surfacing, Evan's paranoia amplifies, and the feeling that he never really knew Ariel at all starts to paralyze dominate his life thoughts. Will he uncover the truth before he loses his mind his grasp on reality?"

So, this was very much an angst book. I'd picked it up because of the intrigue of the "picture" mystery, but very quickly realized I'd underestimated the emotions department. Granted, it is about a guy whose one friend is gone, so I should have expected some of that, but it definitely came across very strongly. Very. I was still able to get into it despite the slightly off-putting levels of angst, and was interested by the separation of normal, seemingly ordinary text with the "subtext" in strikethroughs. By the end of the book, the story had started to mess with my mind, turning old preconceptions on their head and twisting my brain as it tried to process new notions. It was really strange once it ended. Oh, but I have to say: I didn't like the characters much at all. I think this is the kind of book that that's expected in, but meh. Just saying. I want to mention, though, that it's short. Really short. It's even shorter than it looks from the outside because sometimes a fragment or photo'll take up just one page--actually, that happened a lot. So, just saying, if you decide to read it you know it'll go fast. I ended up liking it fine enough, especially because of the twists at the end that gave my brain a workout. So, if you like psychological-type books, this one's completely and totally for you. If you don't like angst, you'll pretty much hate it. I s'pose I could swing either way on this one. Find out for yourself? It's at Kettleson.