"Analysis of the Creator"

A journal written by Aida outlining many details about The Creator, including those that most Zetans aren't privy to. It was penned by Aida, lost in the Aida Spacetime Incident alongside many of their inventions, and eventually found by Emelia Reragon, who is able to read the Ossein it's written in.

The book doesn't list all the Creator's secrets -- her true appearance is still unknown, for example -- but it does reveal that she can travel to Zeta, she is mortal, and eliminating her would allow one to take her role and powers. Aida was able to uncover this through a combination of forbidden Seraph knowledge and centuries worth of travel and discovery.