"A History of Mythic Europe"
Most flavor books I've bought, such as the tribunal books, have a wealth of information on the mundane and hermetic ancient and recent history, as well as the situation as of 1220, but provide only the most fleeting ghosts of an image of what might happen next politically, militarily, scientifically, magically, etc.
This is great when my saga begins, say in the Thebes Tribunal in 1220, but 20 years into my campaign, when the characters venture out into Persia and the Mongolian Steppes beyond, I'm left to do 99% of the research and creative work, as story seeds, political details, etc, have become outdated.
I'd love to see a book covering a broad scope of "future history" in Mythic Europe. I could see this book covering perhaps 100 years, 1220-1320, a decade a chapter. Major events of interest, primarily mundane, that match or mirror real world events (such as the mongols' forray into Europe in the 1240's, the 5th crusade, the divided papacy) could occupy the main text, while realm-specific stuff and other things that might be more YSMV could be covered in sidebars: possible hermetic breakthroughs, new technologies like cannons, etc).
This wouldn't have to attempt the impossible task of covering "every" real or imagined "historical" event in mythic europe, just ones of significance or interest.
This could also be organized by tribunal/region, and detail interesting events in each. Or it could be organized with one event per chapter...
What do you'all think of a book like that? Would you buy it if they made it?