This is slightly outside the bounds of what you asked for, but I think you might appreciate Vermis.

It’s an art book/game guide for a dark fantasy action adventure game, except the game doesn’t actually exists. The whole thing is entirely fake — basically all of the world building of a video game but without the actual game. The art is fantastic and there’s really nothing else quite like it.

I think originally it was only available in paperback, but a hardcover edition is available now as well for more of that “coffee table book” vibe.