A Campaign and Adventure Guidebook for Middle Earth includes a full-color 24" x 36" poster map of Middle-earth, including the wild lands - north, south, and east - and a superimposed reference grid. Descriptions of the principal inhabitants of Middle-earth, a language tree and linguistic data; cultural notes; and an in depth time line. Maps and notes on Middle-earth's topography, climate, trade routes, and population centers. Guidelines for incorporating Middle-earth into any major role playing system.
More obsessive documenting of Middle Earth. I had a copy of Tolkiens map (you now, the fold out one in the back of nice editions of the trilogy) blown up to 3'x6' that I tracked our campaign on; if you look closely at the eastern edge of Mirkwood, there's a small, free-standing section of the woords. We burned it down by accident, and had to black it out on our map.