For non-Irish I'm thinking a map would help every 2 pages or so. Many locations, cities and counties are mentioned, without any maps. Granted, I came to this not knowing much about Ireland at all, but I think this book could have used some help. In addition to a map, possibly a timeline of main events, and possibly short bios of the main protagonists in footnotes or something.
As it was, it was certainly interesting, but I found myself lost and having to reread sections over and over.
Regardless, I did learn some interesting factoids. Would have liked to learn more about the Ulster-Scot emigration to the States, and possibly about the decline and then spread of Gaelic, and when and how different areas were affected by this.