All Tolkien's novels related to the Lord of the Rings are accessible.

The Hobbit

The Lord of the Rings trilogy:

The Lord of the Rings: The Fellowship of the Ring

The Lord of the Rings: The Two Towers

Lord of the Rings: The Return of the King

Silmarillion

Children of Lin Hu, children of Hurin.

Unfinished story

History of Middle-earth, Volume 12 History of Middle-earth.

The novel ends here. ...

There is also the album "The Road Is Long, Xiu Yuan Xi".

The Adventures of Tom Bambadil, a collection of poems.

History of the Hobbit and so on. ...