From the recovery of ancient ritual magic at the height of the Renaissance to the ignominious demise of alchemy at the dawn of the Enlightenment, Mark A. Waddell explores the rich and complex ways that premodern people made sense of their world. He describes a time when witches flew through the dark of night to feast on the flesh of unbaptized infants, magicians conversed with angels or struck pacts with demons, and astrologers cast the horoscopes of royalty. Ground-breaking discoveries changed the way that people understood the universe while, in laboratories and coffee houses, philosophers...