The Guide to Glorantha (both volumes!) is an incredible pair of books, and certainly a good coffee-table book. It's the sort of thing that a complete stranger could pick up, have a bit of awe at the sheer size and artwork, start reading from a random page, and just immerse themselves in an incredibly strange and beautiful world.

RQ6 is a pretty good game :) My preference is still with 3rd edition, but heck, that's grognard stuff. I mean it came out in 1984..