This is a shot of my main shelf of gaming books and materials. All the “collectors’ items” – mostly vintage Judges Guild products- are around on the other side of this shelf at the same level in archive boxes.
I always loved the demons described in OD&D. The Eldritch Wizardry supplement isn’t the strongest of the four. The psionic system there is notoriously for its poor construction and its ill effects on any game into which it is introduced. The revised wilderness encounter tables are, on the other hand, great – and the demons? Oh, the demons are terrific.