Hanegraaff's doctoral dissertation explores the phenomenon of New Age religiosity in terms of the greater field of Western esotericism and examines it via the etic lens of objective analysis pioneered by previous scholars such as Frances Yates (1899-1981) and Antoine Faivre (b. 1934). There were three things about this book that I found to be particularly illuminating. First, Hanegraaff surveys the field of New Age literature in such a thorough way as to give the reader a comprehensive understanding of the ideational underpinnings of the movement. This is done both by presenting appropriate excerpts from key texts along with critical analysis of the ideas presented. Second, the investigative methodology Hanegraaff uses is more fully developed in this book than in many of the previously written seminal works in Western esotericism. In adhering to such strict scholarly standards, Hanegraaff is able to approach a subject which is widely taken lightly by outsiders with a degree of seriousness achieved no where else. Third, the book's final section succeeds in integrating the New Age phenomenon within the historiography of Western esotericism—demonstrating that it is not, as it often presents itself, something wholly new, but is rather a logical continuation of older idea which have been adapted to suit the secular field of thought within which they now rest.