The book ‘A Discovery of Witches’ is written by Deborah E. Harkness. ‘A Discovery of Witches’ is the 1st book in the All Souls series. The story is about Diana Bishop, a scholar and witch, who unwittingly calls up a bewitched alchemical manuscript at Oxford’s Bodleian Library. As the story goes, this discovery causes a fantastic underworld stir and soon a horde of demons, witches and vampires descend on the library.