[quote=Rosemoss]
"The book of Zeref?" She found herself wishing she had spent more time in the library. Of course she read up on her own magic, but other than that all she read was leisure books.
[/quote]

"Yes. The Black Mage Zeref had a book full of his demons and spells," Crimson said. "There's only one book in existence, because creating copies of the book would put extremely powerful, deadly spells out into the public for anyone to use, and that could be disastrous."