"Finally, what we've been waiting for! Rankine's Claves Intelligentiarum is a vital peek-behind-the-veil of a practicing magician with decades of experience, lucidly distilled for practitioners to immediately begin crafting their own, idiosyncratic practice. Rankine's tome not only is deeply rooted in the Solomonic grimoiric corpus, but demonstrates how this tradition is built on new adaptations of consecrations, conjurations and other updates suited to our modern world to conjure the Planetary Intelligences." -- Alexander Eth, Host, Glitch Bottle Podcast

"After completing an encyclopedia of grimoires, David Rankine has offered us one his own! The Planetary Intelligences have captured the attention of many occultists. Agrippa provided their names and seals, but no specific protocol for conjuring them. Now, thanks to David, anyone that reads Claves Intelligentarium will know exactly what to do to conjure these beings. Just as importantly they will know why they are doing. If you are new to evocation, this is an ideal first grimoire, but even experienced magicians will walk away with new insights. I know I did." -- Jason Miller, author of Consorting with Spirits as well as many other books and courses.

"David Rankine's lucid interpretation of Agrippa's summoning of the Planetary Intelligences enables effective communication with an overlooked cadre of angelic powers whose intellectual motion is actually responsible for all astrological emanations and astral magic transmitted from the heavens to Earth. At present, when the venerable traditions of European Conjuration are regularly disrespected by the fabrication of ersatz "grimoires" that owe more to fantasy fiction and undigested Crowlianity than serious efforts to bring the wisdom of Western Magic to modern readers, contributions such as Rankine's Claves Intelligentiarum are all the more commendable and welcome." - Jim Baker, author of The Cunning Man's Handbook

"Claves Intelligentiarum is without question a foundation of magic not only for beginners but experienced practitioners alike. David has drawn upon all the classical source text and brought together a system that is grounded in historical tradition and yet takes in the concerns of a modern lifestyle. It presents its readers with a fresh and unique view towards conjuration and goes even further as it presents a system which corrects certain errors carried over for the past several hundred years." -- Daniel Clark, Ars Notoria