I know there are a great deal of people who hate this book. I don't know why! I am not a Llewellyn fan, because I feel that they rush anything into print, whether it's written or researched well, as well as putting out books that don't even skim the surface of a subject. This book is the exception, and believe me, I've read an extensive amount of books on Celtic myth and spirituality! So I at least have something to go on when I say that this book is a gem!
It's well researched and so comprehensive, that you really don't even need any other book if you want to learn about Celtic magick. GRANTED, we really don't have a lot of information on what the Celts did or why, because they didn't write any of it down, and the Christians destroyed as much evidence as they could. BUT, this book does not claim to teach you THE way of Celtic spirituality. It gives the Wiccan/witch/Pagan a treasure trove of information on every possible subject so that you can add Celtic influences into your rites/philosophy. It is beautifully written, endlessly helpful and wonderfully practical.
So it may not be suitable for scholars or people who MUST have things EXACTLY as history dictates. But if you are exploring Celtic spirituality and need a place to start, or if you are a practiced Celtic witch/Pagan, you will value this comprehensive volume for it's invaluable reference material and never-ending inspiration.
This book provides a good overview of how one can integrate elements from Celtic traditions into their own spiritual/magickal practice. I recommend it to beginners who are inclined toward being eclectic and eclectics who are looking for some really basic reading material. This book doesn't really adhere to a specific Celtic/pagan tradition which I think is why it has been the most suitable beginner's book for me (both to Celtic spirituality and pagan rituals in general). Having been raised to honor Christian and pagan tradition (yes it does work or my family wouldn't exist), and being quite happy already with my own Christian eclecticism, it's taken me a while to find an intro to Celtic paganism that isn't too fluffy or too specific (i.e. Druidry, Wicca). I personally don't need a book to tell me how to be a Celtic Wiccan/Druid/Faery Wiccan/etc. at this stage, so I don't find those types of books as the most useful. This one provides just the right overview of the Celtic pantheon and practical pagan ritual. When I want to read about the history of the Celts I go read history books! (For crying out loud, the title of this book is "Celtic MYTH and Magick"). I also have to note that guided meditations in here are absolutely wonderful. I thank the author for writing them and sharing them with her readers.