This book Demonology influenced Shakespeare’s Macbeth and Hamlet in ways I’ll get into later. It was written by King James himself, and it takes the form of a dialogue, that is, an intellectual conversation where the concept of witchcraft, sorcery, necromancy, etc is explained, debated, and questioned between two imaginary people.
In the video, Youtuber Andrew Rakich, known for his history series, Checkmate Linconites, (where he plays two characters who argue about the Civil War from a Union and Confederate perspective) has done a dramatic reading of the whole book in the accent of 1600s England. It’s part audio book, part history lesson, part linguistics lesson, and all great!
Here are some of my favorite quotes from the book:

Just like in Dr. Faustus, James theorizes that the Devil lets all so-called sorcerers and necromancers believe they have power over him, to deceive them later.
For as the humor of Melancholie in the selfe is blacke, heauie and terrene, so are the symptomes thereof, in any persones that are subject therevnto, leannes, palenes, desire of solitude: and if they come to the highest degree therof, mere folie and Manie:
Demonology, Chapter 1, p. 30,. Reprinted from Project Gutenberg
This passage echoes Hamlet’s description of his own meloncholy, and his fear that The Devil might be trying to use his melocholy to conjure up his father in order to damn him:
The spirit that I have seen
600
May be the devil, and the devil hath power601
To assume a pleasing shape; yea, and perhaps602
Out of my weakness and my melancholy,603
As he is very potent with such spirits,603. As . . . spirits: i.e., because he has great influence on those who have a temperament such as mine.
604
Abuses me to damn me. I’ll have grounds604. Abuses: deludes. If the Ghost is deceiving Hamlet about King Claudius’ guilt, and Hamlet kills him, Hamlet would be a murderer, and therefore damned.
Hamlet, Act II, Scene ii, reprinted from Shakespeare Navigators.com.605
More relative than this: the play’s the thing606
Wherein I’ll catch the conscience of the king.
For that is the difference betuixt Gods myracles and the Deuils, God is a creator, what he makes appeare in miracle, it is so in effect. As Moyses rod being casten downe, was no doubt turned in a natural Serpent: [pg 023]where as the Deuill (as Gods Ape) counterfetting that by his Magicians, maid their wandes to appeare so, onelie to mennes outward senses: as kythed in effect by their being deuoured by the other. For it is no wonder, that the Deuill may delude our senses, since we see by common proofe, that simple juglars will make an hundreth thinges seeme both to our eies and eares otherwaies then they are. Now as to the Magicians parte of the contract, it is in a word that thing, which I said before, the Deuill hunts for in all men.
Demonology, Chapter 6, p. 23
It’s very useful to conceptualize what the early Jacobeans thought the difference was between God and the Devil, and thus the difference between divine miracles and hellish charms. In James’ eyes, all magic and demonic arts were mere illusions, designed to play upon men’s senses and draw the intended victim into the Devil’s power. Obviously, since all of theater rests upon such illusion, it’s no wonder Shakespeare portrays magic onstage in his most popular works. In particular, this passage calls to mind the magic of Prospero, who is able to conjure spirits fo a while, but they all eventually dissolve:
PROSPERO
146
You do look, my son, in a mov’d sort,146. mov’d sort: troubled state.
147
As if you were dismay’d: be cheerful, sir.148
Our revels now are ended. These our actors,148. revels: festivity, entertainment.
149
As I foretold you, were all spirits and150
Are melted into air, into thin air:151
And, like the baseless fabric of this vision,151. baseless fabric: structure without a physical foundation.
152
The cloud-capp’d towers, the gorgeous palaces,153
The solemn temples, the great globe itself,153. the great globe itself: all the world, [and the theater] >>>
154
Yea, all which it inherit, shall dissolve154. all which it inherit: all who live on it.
155
And, like this insubstantial pageant faded,155. insubstantial: without material substance.
156
Leave not a rack behind. We are such stuff156. rack: wisp of cloud driven before the wind.
The Tempest, Act IV, Scene i.157
As dreams are made on, and our little life158
Is rounded with a sleep.


For although, as none can be schollers in a schole, & not be subject to the master thereof: so none can studie and put in practize (for studie the alone, and knowledge, is more perilous nor offensiue; and it is the practise only that makes the greatnes of the offence.) the cirkles and art of Magie, without committing an horrible defection from God: And yet as they that reades and learnes their rudiments, are not the more subject to anie schoole-master, if it please not their parentes to put them to the schoole thereafter; So they who ignorantly proues these practicques, which I cal the deuilles rudiments, vnknowing them to be baites, casten out by him, for trapping such as God will permit to fall in his hands: This kinde of folkes I saie, no doubt, ar to be judged the best of, in respect they vse no invocation nor help of him (by their knowledge at least) in these turnes, and so haue neuer entred themselues in Sathans seruice; Yet to speake truely for my owne part (I speake but for my selfe) I desire not to make so neere riding: For in my opinion our enemie is ouer craftie, and we ouer weake (except the greater grace of God) to assay such hazards, wherein he preases to trap vs.
Demonology Chapter 5, page 15.
It almost seems in this passage that James is covering his tracks against any detractors who might be wondering if he himself might be damned for knowing so much about witchcraft. Accordingly, he asserts that the knowledge of witchcraft is perfectly lawful, it’s the practice that damns the scholar.