What subtitle follows 'or' in The Hobbit's full title?

The subtitle following “or” in The Hobbit’s full title is There and Back Again. Tolkien’s complete title is The Hobbit, or There and Back Again, presenting the book as both a character-centered adventure and a return journey.

The phrase reflects Bilbo Baggins’s departure from his comfortable home in Hobbiton, his expedition to the Lonely Mountain, and his eventual return. Bilbo travels with Gandalf and Thorin Oakenshield’s company of dwarves, confronting trolls, goblins, giant spiders, wood-elves, and the dragon Smaug along the way.

There and Back Again is not the title of a separate sequel or a modern film subtitle. Tolkien used it as part of the novel’s title from its 1937 publication. The wording also echoes the structure of a traditional travel or adventure narrative: a person leaves home, undergoes dangerous experiences, and comes back changed. The later Lord of the Rings books expand the world dramatically, but they do not replace The Hobbit’s original subtitle.