doctorbadwolf
Heretic of The Seventh Circle
Heroes of The Feywild
Races of Stone (and probably the others? maybe? IIRC Races of Stone was the only really really well written one) Love me some deep dives into cultures.
The Shadowfell: Gloomwraught and Beyond
I don't want any reprints of setting books, but I do want a Beestinger's Guide To The Multi-verse, that goes into all the published settings, talks about genre in DnD, talks about worldbuilding, and talks about how the worlds are or can be connected. Nerule lives in Greyhawk, but is dead in the world of The Nentir Vale. The Raven Queen is a mad godling that screws with the natural process of death for kicks in some worlds, but in better written worlds isn't anything like that, etc. Gnolls in some worlds are demonic rage-automotons, while in other worlds they are people. Stuff like that.
Races of Stone (and probably the others? maybe? IIRC Races of Stone was the only really really well written one) Love me some deep dives into cultures.
The Shadowfell: Gloomwraught and Beyond
I don't want any reprints of setting books, but I do want a Beestinger's Guide To The Multi-verse, that goes into all the published settings, talks about genre in DnD, talks about worldbuilding, and talks about how the worlds are or can be connected. Nerule lives in Greyhawk, but is dead in the world of The Nentir Vale. The Raven Queen is a mad godling that screws with the natural process of death for kicks in some worlds, but in better written worlds isn't anything like that, etc. Gnolls in some worlds are demonic rage-automotons, while in other worlds they are people. Stuff like that.