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)