I've expounded before on how 'fluff' is a lousy, stupid, destructive, and misanthropic way to refer to 'any written content other then game rules', that no one with any respect for themselves or anyone else would touch with a 20' pole. But it's self-evident.
A couple of outstanding d20-related works not mentioned yet are Gary Gygax's Living Fantasy and Vincent Darlage's Road of Kings.
A couple of outstanding d20-related works not mentioned yet are Gary Gygax's Living Fantasy and Vincent Darlage's Road of Kings.