I came across this book in a metaphysical bookshop when I was just starting to get into paganism. I did not wind up pursuing a Wiccan path, so take that as you will. Everything below is purely my opinion.
This book is supposedly a continuation of his previous work (Wicca: A Guide for the Solitary Practitioner), which I haven't read. Nevertheless, I found this to be a very solid, introductory book to Wicca (Wicca 101, if you will). It goes over topics such as what the God and Goddess are, how to start a Book of Shadows, some basic prayers, the Wheel of the Year, etc.
It's not particularly different from any introductory Wicca 101 information you can find on the Internet, but the main difference is Cunningham's writing style, which is clear, straightforward, and authoritative. This is both good and bad - good in that it is simple and easy to read and laid out coherently. However, his tone also conflicts with some of the messages of the book: while he is advocating that each solitary practitioner should work out their own tradition and path, his writing style also indicates that the stuff that he's got in his book is The One True Path, with little room for creative reinterpretation. Although he mentions the Wiccan Mysteries, and bullet points some of the Wiccan beliefs on deities, for instance, it's hard to find true mysticism from his book alone, which is simply an instruction manual on "this is what Wiccans do". There's very little in the book that makes you ponder the mysteries of life and death and the world; for that, you'd have to get another book.
The other thing I would say was missing from his book was engagement with other religion. Throughout the book, he insists that if you do this or fail to do that, then it's not Wiccan.
I feel like there's a conversation missing from this piece, about why one chooses Wicca out of all other paths. This book is perfect if you're already 100% certain you're going to dive headlong into Wicca, but it seems like for people who have more questions, just saying, "Well, this is what Wicca is, and so if you're going to be Wiccan, then that's the end of that" is not enough. Of course, it's perhaps unfair of me to expect Cunningham to cover EVERYTHING in such a small tome, but whatever."Just as one bolt of cloth can be cut and stitched into a huge variety of objects ... so too can Wiccan rituals be fashioned in many ways. However, if you wish to make a shirt from that cloth but decide not to include sleeves, you won't end up with a shirt ... Though Wiccan ritual structure is a bit loose, those aspects of it that are set must be followed if you're to continue practicing Wicca."
It's definitely an interesting enough book, and I whole-heartedly recommend it as an introductory text for anyone who's just starting out. But I'd take most of what he says (especially the stuff along the lines of "this is what Wicca is, no questions asked") with a grain of salt, and read a bunch of other books afterwards (which is what you're supposed to do as a Pagan, n'est-ce pas?)
3 out of 5 stars.
(Again, everything here is my opinion; I'd love to hear others' thoughts about it.)