Cybertext: Perspectives on Ergodic Literature is another more academic book which seeks to classify interactive works very thoroughly. There's some interesting research and connections to traditional rhetoric, but it's pretty heavy at times (at least it's concise and methodical writing). The definition of an interactive text springs off of where "the user decides which path to take." I think there's also some discussion of how in any physical book, you can decide what parts to read, to read the ending first, etc., but with a computer game, for example, you can't just jump to the ending and read it there, you have to go through the game. It's very interesting to me, but it's not exactly a page-turner.

I thought Wark's Gamer Theory looked really cool, but I've started to read it several times and I can never follow where he's going. It seems like someone who reads a lot of philosophy just spouting off random associations with games? If someone can explain this book to me, I would love to hear it.