We cannot accept the the view that, with the coming of Christians, paganism died. In Britain, as in Ireland, the old faiths, the old remedies, and the old names spelling comfort and protection must have continued to be resorted to long after the spreading of the message of the one God, and this can be demonstrated, amongst other things, by the penitentials which refer to dark practices, and the castigations of the militant saints denouncing the pagan pursuits of their sometimes unwilling adherents. But there would be no reason to end with the establishment of the Christian faith either, for even in the twentieth century in the Celtic countries, echoes of the old pagan world can be detected and beliefs, furtive and uneasy, but nevertheless strong, as well as oral tradition of an entertainment nature, persist among the people who derive more than their linguistic traditions from the barbarian past.And here are a few reviews found scattered about teh internets (some with accompanying excerpts):
At Celticscholar's blog from July, 2009
Everyone who studies Celtic beliefs knows that many aspects of pre-Roman and pre-Christian beliefs remain shrouded in mystery. Ann Ross in this comprehensive book is trying to convince us, the readers, that neither the Roman invasion of Britain nor the coming of Christianity eliminated pagan religious practice....Another very positive review, this one by Andrea S. Garret at the greenmanreview.com website.
The book is a great reference when it comes to what evidence we have of the Celtic religion, and a good starting point for more research. The kind of book that you can refer to from time to time to find evidence of sacred animals and what kind of cults can be found in Britain. A good reference book to have.
A 1996 review by Ellen Evert Hopman at keltria.org:
Pagan Celtic Britain is one the foundation stones of modern Druid scholarship and anyone aspiring to the title of Druid should own a copy. The book's greatest value is the solid archaeological evidence Dr. Ross provides to support her statements.1999 review by J. Craig Melia at the Druid Order of WhiteOak website.
Originally published in 1967, Pagan Celtic Britain is one of the most important studies on the subject, despite the tendancy in some circles of viewing the work as out-dated.