God Details detail aspects of the gods that are not appropriate for player viewing, e.g. how they adjudicate DI rolls, their feelings towards creation and use of their divine artifacts, and their relationships with other gods.
Origins & Secrets explains where various creatures and figures in the PFC world come from: this is information that is not public knowledge in the world and may be spoilers for campaigns. Certain secrets of the PFC multiverse are also laid out here.
GM Advocacy Assignments including the current GMs running the gods, as well as GMs in charge of specific locales.