I haven't read the book, but I recall it receiving mixed reviews when it came out.

From what I can gather, it falls between two stools. It isn't simply the author's personal recollections of the folk scene at a particular time, the author went to some trouble to interview many of those involved. However neither is it a comprehensive fully-researched history. Perhaps its problem is that its claim to be a "history of British folk clubs" raises expectations which it fails to deliver.

Nevertheless, it is surely a good thing that there is some record, however flawed and incomplete, of the folk club scene.