Well, I can't really "review" this book since it was the basis for my own MA thesis and since it was Mr. Bartlett himself who suggested that I work on Charles O'Conor correspondence as the main primary source for my MA thesis.
Still, this book details how the sense that an Irish nation existed emerged during the 18th and early 19th centuries. Bartlett's prose is impeccable as well as his method, two qualities that, besides my own interest for this subject, place this book as a major work that I recommend to anyone interested in Irish history and the Irish "Question."