What's Your Favorite Fluff...Stuff?

[sckeener]

Ptolus
Ars Magica
Fiendish Codex 1
Demonomicon
Pathfinder
Ancient Kingdoms: Mesopotamia
HR1 - Vikings Campaign Sourcebook
The Glory of Rome Campaign Sourcebook
Age of Heroes Campaign Sourcebook
Monster Mythology
Powers & Pantheons
Faiths & Avatars
Monstrous Arcana - The Illithiad

 

[Desdichado]

The Monsternomicon books.

Five Fingers.

Freeport.

Midnight.

The Demonomicon articles in Dragon. Although they were a bit crunch heavy for my tastes.

Eberron.