The Lord of the Rings is an epic high fantasy novel written by the English author and scholar J. R. R. Tolkien. Published in three volumes between 1954 and 1955, it is one of the best-selling books ever written, with over 150 million copies sold worldwide. The story began as a sequel to Tolkien's 1937 children's book The Hobbit but evolved into a much larger work, set in the richly detailed world of Middle-earth. The narrative follows the quest to destroy the One Ring, an artifact of immense power created by the Dark Lord Sauron, which must be cast into the fires of Mount Doom to prevent his conquest of the world. The story is seen primarily through the eyes of the hobbits Frodo, Sam, Merry, and Pippin, who are joined by the wizard Gandalf, the men Aragorn and Boromir, the elf Legolas, and the dwarf Gimli, forming the Fellowship of the Ring.
Tolkien drew inspiration from philology, mythology, Christianity, earlier fantasy works, and his own experiences in World War I. The novel is divided into six books, with extensive appendices covering the history, languages, and genealogies of Middle-earth. Its themes of friendship, sacrifice, the corrupting influence of power, and the triumph of good over evil have resonated with readers for decades. The Lord of the Rings has had a profound cultural impact, influencing countless works of fantasy literature, film, and art, and remains a cornerstone of the fantasy genre.