[quote=@Instigator]
[@Atroposer]
Tentatively interested. What sort of geographic location do you have in mind for the first "book"? Are all and any gods of Greek mythology allowed and how would Roman gods differ from the Greek ones? Percy Jackson style? Are Gods actual physical entities in the game or do they act as higher powers as opposed to bodily going around and doing stuff?
[/quote]

Well, geographically, it would be logical for the gods themselves to come from Greece, where most of their worshippers and temples were/are. Though I'd like if they took to the rest of the world in light of a movement of 'globalization' in order to increase numbers and the like. 
 
I'm still thinking about the Roman and Greek gods. I'm going to be honest, it's probably going to end up being only the Greek gods if I have it my way. Keeps things simpler. 

I imagine the gods would have physical forms, in order to make things easier, as in getting an eye on the ground. Zeus did it quite often in the original myths(though for different reasons) so I don't think it's too far fetched. Though it would differ from god to god. Hera for example, would prefer to remain a formless entity, though willing to appear in a body if it suited her purpose at the time. Hades would quite possibly be neutral to the idea of it, and keep a physical form for convenience.