Villains who appear in gamebooks: a book of which the reader is the hero, which offers a setting and several situation and choices, like a one-person role playing game. These books are often set in a fantasy universe, threatened by some sorcerer or other demonic being that the player has to track down and to kill, following a specific fighting system or special rules. Because of this, these villains share many similarities with the final boss of a videogame, and are rarely encountered before the final battle.