This book’s title, as well as Melvyn Bragg’s recommendation, made it an obvious choice for me. I must say that there were stylistic, syntactical, and organizational anomalies throughout. There was more material on non-Jewish/Christian/Islamic angelic beings, genii, and daimons than expected (which I mostly enjoyed), as well long forays into medieval angelology and neo-Platonism, but surprisingly little material on fallen angels and how existing traditions (say, the seven archangels of Roman Catholicism) came to be.
The epilogue partly explains this, with the author clearly interested in medieval angels, Jungian psychology, and spiritual openness rather than dogma or the development of more fixed traditions. That’s fine, but she also clarifies that she initially planned to exclude the fallen angels. And it certainly felt that way reading it. Of course, the more I think about it, it’s an enormous topic, and a more methodical approach to these long, overlapping histories likely would have made for a much longer (though arguably better) book.