The Monsters Know What They're Doing     Dungeons And Dragons (no source link)
Angry Golem (web)     D&D 5e original/official source
Pathfinder 2e Bestiary 1     Pathfinder (no source link)
Monster Ecology Anthology     D&D 5e (no source link)
Critter Cache: Prehistoric Beasts     D&D 4e original/official source
Hacklopedia Of Beasts     Hackmaster (no source link)
Hacklopedia Of Beasts Vol 4     Hackmaster (no source link)
Monster Guide     World Of Warcraft RPG original/official source
Monster Tome     Blood And Treasure (no source link)
Adventures Dark And Deep     Adventures Dark And Deep (no source link)