This book is about the fact that hardware, software, and networks are now so powerful that they're encroaching deeply on human skills and jobs. Human workers, in short, are in a race against the machine.
However, we don't want to come across as alarmist or doom-and-gloom. This is a book about the economic implications of recent technological progress. We are academics, and refer primarily to other academic work and our own research to make our points.
We probably don't want to do anything obvious with the cover, like show a human sprinter racing an android, or a robot arm-wrestling with a person. We probably want to be more abstract than that. In the book, we mention the power of exponential growth to overtake traditional linear thinking, chess, office work, etc.
The cover has to include the title "Race Against the Machine," the subtitle " How Technology is Accelerating Innovation, Driving Productivity, and Irreversibly Transforming Employment and the Economy" and our names Erik Brynjolfsson and Andrew McAfee (in that order)