The Monsters Know What They're Doing Dungeons And Dragons original/official source
OSE Encounter Activity Tables Any original/official source
Pathfinder 1e Bestiary 1 Pathfinder original/official source
Pathfinder 1e Bestiary 4 Pathfinder original/official source
Fey Revisted Pathfinder original/official source
Exotic Encounters Pathfinder original/official source
Faerie Bestiary D&D 5e (no source link)
Old Gus: Fey D&D 5e original/official source
Monsters And Treasure Of Aihrde D&D 5e original/official source
Monster Ecology Anthology D&D 5e (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)
AD&D Monster Manual AD&D 1e (no source link)
QUERP Bestiary QUERP original/official source
Monsters And Treasure (2019) Castles And Crusades original/official source
Harnmaster 5e Harnmaster (no source link)
Iron Falcon Handbook Of Monsters OSR (no source link)