With all the signs pointing to a witch being behind the murders, Ashaf and Guideau must track down the perp. Unfortunately for them, however, this serial killer is powerful and always seems to be one step ahead.
I realized that some of the riddles 
were quotes from a book.
أدركتُ بأنّ بعض الرّسائل كانت
اقتباساتٍ من كتاب
Uns ist aufgefallen,
dass viele der Rätsel
car j’ai remarqué
que plusieurs énigmes
Ho capito che alcuni degli indovinelli
erano presi da un libro.
Percebi que alguns dos enigmas
eram citações de um livro.