Wonders of the Invisible World was a book published in 1693 by Cotton Mather, defending both belief in witchcraft as an evil magical power, and Mather's own role in the witchhunt conducted in Salem, Massachusetts.
Its arguments are largely derivative of Sadducismus Triumphatus by Joseph Glanvill. A copy of Glanvill's book was in Mather's library when he died.
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