I like the journalistic style of this book. It means that a subject that could otherwise be quite heavy is dealt with in an approachable yet informative way.
I have to admit that I did not have a deep knowledge of Scottish history beforehand not being from these Isles originally, but I think he makes a good argument in the brief historical/cultural overview that sets off the book where he points out that there wasn't a real independence movement that had any traction with the general population till the British Empire was at its last throes, the Second World War had brought better conditions to the workers (a support Scotland had not received from England before they were needed in war) and the fall of the "Kirk" which had held tightly onto the people to stay in their place.
He looks at the rise of the Scottish National Party, the future with(in) the EU and many other relevant issues that are well worth a walk-through and it is a good way to put it into context but also a good way to look at the arguments for and against independence. I think it is very evenly balanced.
I found the book informative and interesting - maybe a bit long in the middle for a general reader like me (and possibly skipping a few too many details for an interested party), but I think he did enough for it to warrant a read - especially as the vote is coming up in less than a year's time and it will of course have a massive impact here if Scotland should decide to go it alone.
This book is accompanied by a TV series which I have yet to watch, but if it is anything like the book, it should be an interesting watch.