From publisher blurb:
Essential Enemies 9: Not of This Earth is a third party monster manual for use with Old-School Essentials and other old school fantasy role-playing games. This issue features monsters from other planes of existence and other planets.
This zine contains the following monsters:
Astral Glutton: Spawned in the astral plane, this human worm lives to possess people and use their bodies to sate its own hunger.
Blubbering Manglers: Frenzied blue maniacs from another dimension. The only thing more terrible than the way they mangle flesh is how they augh while they do it.
Demongate Shrine: If you don't leave the proper offering, out comes the shrinegate demon to devour you.
Ermynian Knights: Violet-furred warriors from the Land of Faerie, questing on Earth to aid their arboreal kingdom.
Fire Elves: Refugees from another plane, they use their magic to cultivate a garden that their enemies covet.
The Grexen: The worm-like servants of wizards from another world. But who is the real master in this partnership?
Longman Alchemist: The giant caterpillar man has come to sell the fruits of his living machines. Do you have the means to pay him?
The Mass of Limbs: It has no body, only eyes, teeth, and tentacles. A threat to all other life, no matter what part of universe it lurks in.
Necro Terranauts: They come from a world where the undead outnumber the living, safely inside their protective suits, untouched by the vital energies of Earth that so fascinate and disgust them.
Optical Fungus: A man-eating mass of myconian matter, full of eyes. But once destroyed, new monsters emerge from it.
Ordinary People: They look just like everyone else, until the alien limbs start coming out of them.
Reptiloids: Post-apocalyptic lizard people from another planet. Some become parasites, inhabiting whatever hosts they can find, while others study sorcery, and come to this world of their own accord. And then humans make drugs from their skin.
The Traveller: Riding a shaggy bear with too many eyes, he jaunts around the multiverse, creating illusory recordings of exotic locales for the vicarious enjoyment of his patrons. Perhaps the dungeons you delve will be of interest to him?