Sorry if there already is a discussion on this topic. I went through the search function, but wasn't able to find any similar topics.

My query is: Can anyone recommend some works on Tolkien? That is, books featuring an analysis and interpretation of his works? I'm not so much interested in books that mainly deal with his person (that is, biographies). I am, however, more interested in books that deal with The Lord of the Rings, The Hobbit and the Silmarilion.

Anyone able to point me in the right direction?