Understanding Media by Marshall McLuhan has shaped my thinking more than any other book. Writing in the 1960s, McLuhan was 50 years ahead of his time. He’s the ultimate internet philosopher. According to one writer: "McLuhan’s theories are subtle and powerful. In fact, it is hard for me to imagine anyone being able to navigate the contemporary environment without at least a good grasp of his principles.” This is the best text-based introduction to Marshall McLuhan’s ideas.