The Lord of the Rings is the essential foundation of most modern fantasy, and its fans are spread all over the world. While Tolkien's work is known by most, a good many don't fully understand the depths of the history he gave his masterpiece. For every new location Frodo visited, there was a history accompanying it, detailing great battles, heroic figures, terrible falls, and legendary events. The world of Middle Earth is more than just epic heroes and battles, though. It is also home to some of the most twisted creations in fantasy, a good number of which inform modern fantasy villains today.
Source：https://www.cbr.com/darkest-lore-hardcore-the-lord-of-the-rings-fans-know/
