The authors traveled a lot to get their interviews but the resulting book is a big disappointment. I got the impression that they were more interested in making some clever photos than producing a good piece of work on the subject of robotics. To be fair, there were a few items of interest but they didn't make the book worthwhile. The format of the book is interviews which makes the reading rather boring, the content disorganized, and any meaningful information very difficult to find. If you are interested in robotics, this book is not for you.