UNDEAD

Ghoul

The Monsters Know What They're Doing     Dungeons And Dragons original/official source

Angry Golem (web)     D&D 5e original/official source

OSE Encounter Activity Tables     Any original/official source

Pathfinder 1e Bestiary 1     Pathfinder original/official source

Pathfinder 2e Bestiary 1     Pathfinder original/official source

Monster Codex     Pathfinder original/official source

Classic Horrors Revisited     Pathfinder original/official source

All Sorts Of Critters (web)     Pathfinder original/official source

Monster Manual     D&D 5e original/official source

Book Of Beautiful Horrors     D&D 5e (no source link)

Old Gus: Plantfolk, Undead, And Other Oddities     D&D 5e original/official source

Monsters Of The Orient     D&D 5e (no source link)

Monster Ecology Anthology     D&D 5e (no source link)

Monster Manual     D&D 4e (no source link)

Monster Manual 3     D&D 4e (no source link)

Dungeons And Dragons Essentials: Monster Vault     D&D 4e (no source link)

D&D 2e Monstrous Manual     D&D 2e (no source link)

Scruffy Grognard's Monstrous Manual     D&D 2e (no source link)

13th Age Bestiary     13th Age original/official source

Dragonlance Bestiary     SAGA (no source link)

Hacklopedia Of Beasts     Hackmaster original/official source

Critters, Creatures, & Denizens     Dungeon Crawl Classics (no source link)

Monster Guide     World Of Warcraft RPG original/official source

Old World Bestiary     Warhammer original/official source

Fantasy Age Bestiary     Fantasy Age original/official source

Mystara Adversary Compendium I     Dragon Age original/official source

Abnormal Undead     Any original/official source