The Stafford Library - practical game applications

So, i've been thinking about buying some the Stafford library stuff. I own 2 already: Esrolia, land of 10,000 goddesses and The Missing lands and am undecided about where to go next.

My interests are in practical game applications, geography, descriptions of locations and towns, history, references to cults or powers that could be translated into game terms or ideas.

I am NOT  interested in an endless succession of self referencing mystical navel gazing where each sly reference to a topic completely contradicts the previous reference to that topic , changes the names of everything  (again ) and tells you everything you previously understood about that topic is wrong.....

So with that in mind what are the most useful publications ?