What's her qualifications/background?
There's so much bullshit talked about the Mór-ríoġna that my first instinct is to be sceptical. How do we know this isn't another Robert Graves?
PS: your link says "Stephanie Woodfield (Brookfield, CT) has been a practicing Witch for over fourteen years and a Priestess for ten years. Her lifelong love of Irish mythology led to a close study of Celtic Witchcraft. A natural clairvoyant and empath, she has worked as a tarot card reader and is ordained as a minister with the Universal Life Church."
I'm not NECESSARILY against yanks studying our paganism (e.g. Erynn Rowan Laurie writes very competently and respectfully on it), but this woman doesn't seem to have any history/linguistic/anthro qualifications either (she'd've said it in her author bio if she did)
Anyway I found it on Annas-Archive, I'll have a look and give you my thoughts after the workday if I get time. Bad first impressions.
PPS: Flicked to the 'pronunciation guide' at the back and there's a few mistakes but it's not as bad as I feared. Cailleach (ky-lee-ACK) – why is the C velarised if it's broad?? Fir Bolg (FEER-bolg) – at least transliterate it FEER-bulg.... Morrigan (MORE-ee-gan) – at least she got the first vowel correct (yanks on youtube don't) but she hasn't softened the G.... Ogham (OH-gum or OH-um) – it's clear she doesn't speak the language