Digital Resistance: Explorations in Tactical Media by Critical Arts Ensemble (CAE)
If you are at all interested in using media/technology/art as a tool for direct action or influence check this book out. It was "Anti-copywritten" in 2001 and still very relevant. I would love to see how CAE would discuss the Occupy Movement in the framework of Tactical Media.
Oh, and this book is available online for free download. http://www.critical-art.net/books/digital/
I'm on Chapter 4!