Interactivity explained

Well, it is getting closer. My colleague Lars-Erik Janlert are in the final stretch of the writings of our book in which we explore and examine what interactivity is. It is extremely exciting and fun work. But of course it takes a lot of time. We are not sure about the title yet. In the book we cover  definitions of interactivity and interface, interaction and control and complexity, character, expressions and impressions, how to measure interactivity, faceless interaction, interactivity clutter, etc. We will soon present a bit more about it. Fun stuff...