This is an eminently readable history of magic. Like so much scholarship in the humanities since the 1980s, the basic interpretive frame is power-who has it and who doesn't. The book begins with an overview of ancient religious practices in Mesopotamia, Egypt, Israel, Athens, and Rome, that is prelude to the story that will emerge. Popular religion becomes magic when it is defined by organized religion as alien (what begins in ancient Athens, since magic is religion practiced by foreigners by definition). Fast forward to late antiquity and the middle ages, and in Europe magic is all that folk religion prohibited by the Church, even as the Church domesticates certain rituals and ceremonies.
Then the beginnings of humanism and scientific study happens at the end of the middle ages and scholarly elite, who study of ancient magical texts in translation from Arabic translations of originals, set the stage for the emergence of a rarefied magic that we see in our new religious movements and art. The persecution of witches by the Church is tied to institutional responses to heresy--e.g., the Cathar heresy. Doctrinal changes enabled the simultaneous study of high magic by clerics (exorcisisms, conjuring demons and controlling them with the name of God, etc.) and at the same time set the stage for persecution of women for alternative folk practices. (At the same time, it is abundantly clear that the Church itself had trouble getting convictions in witchcraft, because the claims were too fantastical.)
Fast forward to the modern era and we have the emergence of modern magic (Crowley, et al.) and the study of magic (religion) anthropologically. Modern magic is a set of new religious movements in this context. I would go further and apply Geertz's concept of ideologization of religion and say that modern magic is actually a form of scripturalism in response to modernity. The modern wiccans, et al. are really constructing based on texts produced in the high middle ages, a more "authentic" form of ancient religion, which of course never really existed, but assuages alienation caused by modernity.
Magic and witchcraft is a pretty narrow field of folklore studies in academia, and it is reflected in a spare selection of works in the bibliography. The book also is not footnoted, so it is difficult to know scholarly background for points made. For these reasons I knocked off a star.
The book is lavishly illustrated. What you will not find is how to practice magic. For those looking for an introduction to Wicca, look elsewhere. This is a dispassionate scholarly treatment of the subject.