The Monsters Know What They're Doing 2 (moar)     Dungeons And Dragons (no source link)
Pathfinder 1e Bestiary 1     Pathfinder original/official source
Pathfinder 2e Bestiary 2     Pathfinder original/official source
Tome Of Horrors Complete     Pathfinder original/official source
Mythic Monster Manual v1     Pathfinder original/official source
All Sorts Of Critters (web)     Pathfinder original/official source
Exotic Encounters     Pathfinder original/official source
Monster Manual Expanded v2     D&D 5e original/official source
Fifth Edition Foes     D&D 5e original/official source
Kobold Quarterly     D&D 5e (no source link)
Encyclopedia Of Lifeforms Mundane And Magical     D&D 3e (no source link)
MojoBob (web)     D&D 2e original/official source
Adventures Dark And Deep     Adventures Dark And Deep (no source link)