With my experience in the Wiccan religion, Vivianne Crowley is the most respected author in the midst of the various authors writing about Wicca. She is detailed, and explicite, which is a relief when you look at all the amateurs writing about the subject. Anything Vivianne Crowley has written is highly recommended. She is informative, and precise.
While I had hoped for this, I definatly hadn't expected it; this book was very nice. It was well written and quite inspiring.
Since Crowley is a well known through-and-through Wiccan, the Celtic pagan community seems to have been weary of this book, due to the great lack of good literature on Celtic subjects, by Wiccans... however Crowley surprises me. While you can still see her Wiccan roots shine through, this book doesn't seem to come with a million hands full of lies and missconceptions. While I wouldn't use it as a hand-book to ritual, it is an easy to read inspiration for rituals.