Old D&D books you still use

[Zappo]

I use most of the old Planescape manuals.

 

[Melan]

I use the First Edition DMG a lot, especially the encounter tables and magic items (I prefer its presentation to 3e's). I like to reference the MM as well.

 

[Calico_Jack73]

I use the hell out of my Volo's Guides. I use the maps and overland travel rules from the Forgotten Realms boxed set.

That's about it.

 

[Joe123]

I sometimes use my Dungeons & Dragons Rules Cyclopedia, an invaluable resource. (It covers Basic to Companion boxed sets from Classic D&D).

 

[diaglo]

OD&D(1974) boxed set.

Supplement I Greyhawk
Supplement II Blackmoor
Supplement III Eldritch Wizardry
Supplement IV God, Demigods & Heroes

Outdoor Survival from Avalon Hill

Chainmail by Perrin & Gygax

The Strategic Review (but i don't use the Bard )

and some times i slip Swords & Spells in there...

 

[Ferox4]

The Ecyclopedia Magica volumes are still helpful

 

[Leopold]

Night Below
GDQ Series

 

[Voadam]

2e monster books for the ecology and description sections. The 3.5 MM is better than the 3e one but still not up to the 2e standards for descriptions.

 

[johnsemlak]

Lots of adventures. Curretnly running X4-X5. Adventures are the easiest products to use in different settings IMO.

When I run Greyhawk I use the 83 Boxed set (currently I only have the ESD unfortunately).

I"d love to run campaigns in some of the other classic settings sometime, particularly Birthright

 

[el-remmen]

Aurora WholeRealms Catalog

1E DMG

1E Fiend Folio (the most - best monster book ever!)

2E Tome of Magic

2E Pirates of the Fallen Stars

2E Of Ships & Sea