Wikipedia
Daemonomania is a 2000 Modern Fantasy novel by John Crowley. It is Crowley's seventh novel, and as the third novel in Crowley's Ægypt Sequence, a sequel to Crowley's 1994 novel Love & Sleep. The novel follows protagonist Pierce Moffett as he continues his book project begun in The Solitudes about the Renaissance and Hermeticism, while dealing with a stormy relationship with his girlfriend Rosie Ryder.
Like the previous novels, the novel has four main narrative strands, one occurring in the present day generally following Pierce or Rosie Mucho in their artistic works, and two occurring in the Renaissance following the historical fictional activities of John Dee, Edward Kelley and Giordano Bruno as written by fictional novelist Fellowes Kraft. The difference is marked stylistically by dashes indicating dialogue for events that happened in the Renaissance and events in the twentieth century marked by dialogue in ordinary English quotation marks.