The editor is presumed to have been Henry More, who certainly contributed to the volume;[2] and topical material on witchcraft in Sweden was supplied by Anthony Horneck to later editions.
[6] The book affirmed the existence of witches with malign supernatural powers of magic, and attacked skepticism concerning their abilities.
Glanvill likened these skeptics to the Sadducees, members of a Jewish sect from around the time of Jesus who were said to have denied the immortality of the soul.
The book is also noted for the account of the Drummer of Tedworth, an early poltergeist story, and for one of the earliest descriptions of the use of a witch bottle, a countercharm against witchcraft.
Mather's Wonders of the Invisible World (1693) is largely modelled after this book and its reports, particularly the material relating to the Mora witch trial of 1669.