Sunand Tryambak Joshi is an American literary critic whose work has largely focused on weird and fantastic fiction, especially the life and work of H. P. Lovecraft and associated writers.

Weird fiction is a subgenre of speculative fiction originating in the late 19th and early 20th centuries. Weird fiction either eschews or radically reinterprets traditional antagonists of supernatural horror fiction, such as ghosts, vampires, and werewolves. Writers on the subject of weird fiction, such as China Miéville, sometimes use "the tentacle" to represent this type of writing. The tentacle is a limb-type absent from most of the monsters of European folklore and gothic fiction, but often attached to the monstrous creatures created by weird fiction writers, such as William Hope Hodgson, M. R. James, Clark Ashton Smith, and H. P. Lovecraft.