There was a third hobbit on Mt. Doom that day. But no one likes to talk about that, now do they, precious? (AU. Gollum made a different choice at Cirith Ungol. And, awkwardly enough, he's not dead, somehow, so, uh, now what? Book canon. Not very compatible with the movies.)

Mad Baggins is having a perfectly nice time away in his "library" under the Misty Mountains, living here with his ring and bothering no one, and some disgusting young hobbit with bad manners has tracked in mud. (Role swap AU) (crackfic)