"Buffyverse" is a term coine by fans of Buffy the Vampire Slayer and Angel to refer to the shared fictional universe in which they are set. The term has since been used in the titles of published works, and been adopted by Joss Whedon, the creator of the fictional universe. The boundaries of the Buffyverse have grown over the years. The Buffyverse established by these many stories is a place in which supernatural phenomena are undeniable. The existence of vampires and demons is challenged by people willing to fight against such forces.