Four Rings to Rule Them All is a fantasy novel series written by author J.R.R. Tolkien. The series follows the adventures of a group of hobbits, elves, dwarves, and humans as they battle against the forces of evil in Middle-earth. The story is set in the fictional world of Middle-earth, where the powerful Rings of Power are forged by the Dark Lord Sauron. The four rings are the One Ring, the Three Rings of the Elves, the Seven Rings of the Dwarves, and the Nine Rings of Men. The One Ring is the most powerful of the rings, and it is the key to Sauron’s power. The other rings are used by the various races of Middle-earth to protect themselves from the Dark Lord’s evil. The series is filled with epic battles, magical creatures, and powerful characters. It is a classic tale of good versus evil, and it is sure to captivate readers of all ages.