This is not the book to read if you're looking for a how-to guide to Wicca. This is, however, one of the first books I would recommend to someone who is interested in Wicca. It reads like a textbook at points, and it is dated (being published in 1979), but it is a wonderful view of the early history of Wicca in America.
Dull and dragging. I found a much more consise version of wiccan history in the beginning of most wiccan books. The only good thing is the one naked person.