Best supplement/sourcebook

I loved the Dragonlance series quite a bit. Had a ton of fun running the campaigns with Fizban. I know, it ain't really a supplement/sourcebook, but I like this forum too.

Hmmmmm...I have a couple to start.

1) Faiths and Avatars, the 1996 FR supplement by Julia Martin and Eric Boyd. This was a great mix of solid applicable rules and role-playing material. The book covered the most prominent religions in the Forgotten Realms and was quite detailed.

Two negative points: This was the book that started the Realms down the path of annoying detail and little gaming material. Eric Boyd was later dubbed the 'Thomas Aquinas of the Realms', which I don't think was a good thing necessarily. Also, the book tended in spots to lean towards Munchkinism, as did the followup books. Still a great source, though.

2) Night Below, by Carl Sargeant. This was a truly epic campaign adventure that took a year to finish (interspersed with the Temple of Elemental Evil). I now appreciate how the adventure was crafted to make you nurture and appreciate your character; there were little tidbits specifically included for PCs of different races, classes and alignments. The story was complex and the final battle, when it was fought, was a doozy.

I hope the D20 liscenses will mean many, many more modules from Sargent.

Hmmm...

'Ravenloft' - The original module. Although the 'world' suppliment is pretty cool too.

'The Psionicist's Handbook' - I LOVE this class...

'Beyond the Supernatural' - I know it's actually a rule book but it has some great stuff in it.

'CthulhuPunk'

'At Your Door' - A full length 'campaign' module for 'Cthulhu Now!'. Great, great story! Unfortunately out of print.

'The Stars are Right!' - This is a collection of short adventures for 'Cthulhu Now!'. There are two stories in particular that are outstanding! The first is 'Fractal Gods'. Imagine the Mythos discovering ways to use computers against us. The second I can't remember the title... But it is a disturbing tale of runaways, pornography and the dark god Glaaki... But all of these adventures are outstanding!

I looked for years for the Oriental Adventures book / materials for AD&D long after they were out of print. Just fascinated me. Wasn't playing the game.

I fell in love with Planescape, and just read through the boxed set materials every once in a while. That is much more interesting than the typical D&D settings.

Uncle Albert's Catalog from Hell.

no doubt.

The Campaign and Catacombs guidebook for AD&D Second Edition. It was filled with wicked world-building tips that should all have been put in the DMG.

Expidition to the Barrier Peaks - not a supplement per se, just a module. THE most abused module there is.

Best of Dragon Magazine #1 where they have The Jock as a new PC class.