A forgettable book
Despite the grandeur in the names of the book, Sirin did not think too much of it. As a high ranking member of an organization that was second to none with regards to magic knowledge, she has an ample understanding regarding the principles of resurrection.
That was even more truth about rune crafting. She was not a runemaster herself, but she knows the requirement for every Rank and the capabilities of runes at Rank 4 and above.
Of course, she did not make a judgment of the books before understanding the knowledge inside them. Zatiel may be a Rank 2 life form, but she knows someone who obtained the citizenship from the Scientia Kingdom could not be measure by normal standards.
Everyone was waiting for Zatiel to explain the book and even the mighty Gabriel was focus on them.
Seen that everyone's attention was on him, Zatiel raised the 'Book of rune crafting' before speaking.