I was expecting a bit more from this book, however I found it to be vague and general. It touched on several areas of what makes a (football) Manager, but never really went into detail or discussed the traits at any real depth. There are some good quotes in the book, which at times does seem to rely heavily on referencing other people's work, but it does the job of getting the basic idea across to the reader. Another benefit is that its not constantly the author's view on the subject, which is a nice relief in the reading, and shows the author is aware that there is no real set trait within a manager.
Just a pet peeve of mine, but the overall presentation of knowledge seemed a bit low, with examples constantly referenced back to Liverpool. This gave the impression that perhaps the author was a Liverpool fan (however after a quick check I discovered he was a Man U fan).
There's nothing ground breaking in the book, but it does the job of acting as an easy introduction to the subject. So I'd probably recommend it in that sense, certainly if you're looking for areas and ideas to investigate and read further in depth. Its a light read that you'll probably finish in a day or two without really trying.
Overall I was left feeling disappointed that the book didn't go into further detail, and at times seemed to rely a bit too much on other people's opinions and works to make the core of the book (having already read the books he was quoting).