First of all, a bit of information. The accompanying CD is missing part of the Enochian calls. However, the reader will find the entire Enochian call on audio (for free download) at De Salvo's website dedicated to the book. The name of that website is: myangelmagic.
I gave the book 5 Stars, because it provides a good historical background, and very detailed explanations of a simple Enochian ritual in which no specialized equipment is used. This is quite a boon for the would-be magician, as the props used in other Enochian rituals either necessitate that you be a good carpenter/artist or that you make considerable expenditure to obtain such items. That said, I would have liked De Salvo to explain further why he thinks this particular Invocation can forgo such furnishings. After all, according to the book, the angels told Dee and Kelly they would need a holy table, the Sigillum Dei Aemeth, Ensigns of Creation talismans, breastplate, magic ring and emblems.
De Salvo advises that these exercises be used to get closer to God, rather than as a tool for obtaining earthly desires. However where do you draw the line between the spiritual and the profane in this matter? Surely, one can understand the problems that arise when spiritual tools are put to the service of the ego and its cravings. However, what about helping the ill? De Salvo believes that it should not be used even in that case; however, didn't Jesus and the Apostles heal the sick? Of course, such works should always be prefaced by, "Let Thy will be done".
What to make of working exclusively with the Aethyrs and not the Elementals, as De Salvo does in this work? I am a novice at magic and cannot speak with any authority, however, questions do come to mind in this regard. Much has been written about the need to integrate the Shadow,lest one fall prey to it. Does this have some application to magical work? Do these estranged entities, dubbed evil, grow more evil due to our unwillingness to encounter them (or when we do to use them for our own purposes)? I don't know the answer to this question, but would like to hear from others more seasoned than I on the subject.