Dr. Kelly's book attempts a scholarly reconstruction of the origins of the Wiccan movement, and to a great part it succeeds. Through some luck and due diligence, Dr. Kelly acquired access to texts and individuals that were central to the formation of this growing religion, and showed through careful deconstruction and textual analysis how the entire movement in its present form essentially began with one man, Gerald Gardner, the founder of the "Gardnerian Tradition" of Wicca. However, in dissecting its origins and demonstrating them to be wholely a product of the twentieth century, it also drew a furious backlash from the Wiccan community that has to this day convinced Llewellyn to put off any second printing.
Part of the campaign to remove it from the public eye involves discrediting "reviews", such as the one by Frew, referenced by another reviewer on this listing. His self-important article is not so much a review as a prolonged collection of innuendo, misdirection, logical hair-splitting, and frantic micro-analytical fault finding designed to divert the reader from addressing the spine of Kelly's argument: that all of the material present in Gardner's Book of Shadows were derived from presently available literary sources, leaving essentially nothing for a secretive pre-Gardnerian tradition to contribute. In other words, even if Gardner did join a pre-exiting coven of Witches as was his claim, their existence proves irrelevant as they effectively contributed nothing to the formation of present day Wicca. It was all Gardner (and then Valiente, and so on, and so on ...). This aspect of Dr. Kelly's book is scholastically and analytically solid and worthy of study. Where Kelly falters are in his personal speculations on Gardner's supposed sexual obsessions and how they contributed to the craft (wholely gratuitous to his argument), and on the identity, role and character of Dorothy Clutterbuck (as Gardner was prone to misdirection, simply because a woman by that name existed proves very little). He also shows himself to be arrestingly opinionated on many sundry matters not immediately relevant to his thesis, but wherever Kelly sticks to the texts and his interviews, he is lucid and revelatory.
So for those interested in the actual historical foundations of Wicca, this is a must read. But you need not take my word for it. Raymond Buckland, himself a Gardnerian initiate and a respected author of fortyfive works on Wicca and Neopaganism, wrote of the text:
"At long last we have a book that is a thorough, deeply-researched, scholarly examination of the origins of Gardnerian Witchcraft ... In this work, Aidan Kelly (like a metaphysical sleuth par excellence) painstakingly peers down every little alleyway, pieces together minute details, and makes deductions in a Holmeslike manner, to arrive at what must assuredly be the true picture."