After fairly recently getting into tabletop role-playing, I picked this up in an excellent PDF bundle (with about 15 other books) over at Humble Bundle.
It feels weird to give a game book a star rating, but here we are. WFRP, as the kids are calling it these days, is a gritty, disease-ridden, mutated view of the traditional Dungeons & Dragons fantasy roleplaying genre. The 2nd edition almost reads like an alternate history, with the Empire reading like pseudo-medieval Europe, complete with historical European naming conventions.
I would have liked to see more variety in the cultures available, but that's par for the course. The sheer volume of RP systems available mean that you can find something to play just about any historical setting you want, but I don't believe that was really the case 15 years ago. Even now, the systems that have extensive world-building tend to lean on the traditional Eurocentric fantasy tropes from what I've seen.
While I don't really see myself getting into and playing WFRP long-term, I'd definitely be willing to give it a shot, and the interesting approach of character advancement through careers makes the world feel full and varied. I'm also impressed by the depth and dedication to tone of the various books I picked up.