Satan's Invisible World Discovered $b or a choice collection of modern relations, proving evidently, against the atheists of this present age, that there are devils, spirits, witches, and apparitions, from authentic records, and attestations of witnesses of undoubted veracity. To which is now added, that marvellous history of Major Weir and his sister, the witches of Bargarran, Pittenweem, Calder, &c.

"Satan's Invisible World Discovered" by George Sinclair is a compilation of firsthand stories that aims to prove the existence of devils, spirits, witches, and apparitions to those that don't believe, using supposed factual accounts from the time. It kicks off with the strange story of Sir George Maxwell, who was thought to be hurt by witchcraft involving a wax figure, and a girl who couldn't talk that supposedly revealed supernatural secrets, plus others who pointed fingers at alleged witches. This all leads to a big trial and confessions, showing just how scared people were of witchcraft and what it meant for society back then, setting the stage to explore strong themes around faith, doubt, and how much people believed in things they couldn't see during a time of perceived reason.