This cracking little book is ostensibly about John Dee but is mainly concerned with charting the changing intellectual currents of the Renaissance world. Here, Dee is seen as a bridge between the medieval mindset of magic and superstition, and the advancing tide of rationalism and science. While details of Dee's biography do emerge throughout the text (mainly in the chapter charting the development of his reputation), it is an intellectual history rather than a straight biography.
And what a history it is! French's scholarship is first-rate and will please fans of footnoting and exactness, and his research goes into phenomenal detail about such things as the contents of Dee's library (and by extension, his mind) and Dee's influence on figures like Sir Philip Sidney.
All of this is fascinating, to be sure, but the book's two central chapters - the first on Dee and Hermeticism, the second called Magic, Science & Religion - are the real highlights here. I have never before encountered such sober and scholarly writing about hermeticism, its development, its adherents and its goals. French sets out to demystify things like Hermes' golden tablet and explains exactly why the apparently pedestrian conclusions drawn by occultists over the years have had to be shrouded in secrecy.
He expounds on the cabala and the beliefs of its students in a fashion mercifully free of the deliberate mystification and obfuscation that tends to surround most work on the topic, and reveals the steps by which such a brilliant man as Dee can have come to believe he could practice angel magic with Edward Kelley. Far from being a quaint 'ye olde' belief, French demonstrates through his understanding of Hermeticism how the cleverest of all men can come to believe in some very eccentric things indeed.
If you aren't already acquainted with the facts of Dee's life, you may find yourself left with questions after you put this book down - and French readily admits that he has 'barely touched on' elements of Dee's biography (there is virtually no detail whatsoever about the famous aforementioned 'skrying' sessions with Kelley, for instance - although French does explore the question of whether Kelley was a cynical swindler or a mentally unstable man suffering delusions). Indeed, it can't be stressed enough that this book is as much about the intellectual climate of the Elizabethan period as it is about Dee, but this is no bad thing.
I found this book stimulating, convincing and - in spite of what some might think of as dry subject matter - utterly compulsive reading. While the Dee biography The Queen's Conjuror acquaints the reader with Dee's worldly experiences, French's book opens up the magus's inner life in a way I hadn't thought possible. Great stuff!