The Bishop of Bayonne gives Damien three books on demonology by author Jean Bodin and says "Read it all". De la démonomanie des sorciers by Jean Bodin, ("Of the Demon-mania of the Sorcerers"), is in fact composed by four books. Jean Bodin was instrumental in the conviction of Jeanne Harvilliers, "the witch of Laon", at a trial where he gave expert testimony.