This is the last book in the Lord of the Ring series.
Main Theme:
The Battle of the Ring takes place and the Ring of Sauron is finally destroyed.
Summary:
Frodo and Sam are the last ones still on their original journey to Mount Doom. Gollum beats them there and tries to take the ring but falls into the lava in the process. Aragorn becomes king of Gondor and marries Arwen.