This is the first book by R.A. McAvoy that I have read. I feel lucky that I read it and look forward to the other dozen books she has published.Originally published in 1985, The Book of Kells is nicely set in both 1985 and 985 with some back-and-forth time travel. Reading it more than thirty years later, I was struck by the absence of things that date a story. For example, computers have changed enormously in that time so anything that connects closely to the technology may seem clunky to a reader on a later point of the technology timeline. Other than several mentions of a specific model of a car, this story has no technology burden. The lack of cell phones, tablets, or microwave ovens does not make the story feel old. Ironically, the hero, John Thornburn, listens to music on a record player. A twenty-year-old in my family also listens to a record player so it all seemed very normal.The story moved briskly. Characters were well developed. There were plenty of unpredictable twists of plot. The ending was a bit neat but still enjoyable--even Downton Abbey closed up shop on a high note so there's no fault there. Masterpiece: Downton Abbey Season 6The story includes a goodly bit of Celtic and Norse names and some dialogue. The glossary explains many of those mysterious names and phrases. However I found no pronunciation guide in my Kindle version. While "correct" pronunciation is not vital in the privacy of your own mind, it still may feel important at times. In his Iron Druid Chronicles, author Kevin Hearne strikes an ideal balance of providing good background for pronunciation even while observing with good humor that you can fuss about it, or not. Perhaps Ms. McAvoy would consider an updated edition with expanded glossary for those who like that kind of thing.For an example of Kevin Hearne's attention to pronunciation see Hounded (with two bonus short stories): The Iron Druid Chronicles, Book One.But back to The Book of Kells. It was one of those delightful reads that you don't want to put down, that keep you up late despite the need for sleep, or that cause you to speed through the chores of the day so you can get back to the book.It is easy to give 5 stars in this case. I hope you find this helpful.