On the existence of Hobbit Two

Dillo: I want to read more Hobbit after tomorrow [when we plan to finish Danny The Champion of the World].
Me: Do you mean you want to read it again? Because we already read the whole thing' we finished the story.
Dillo: I want to read Hobbit Two, and then when we finish that we can get Hobbit Three and read that. [beat] It only goes up to Four.

He was quite sorry when I explained to him that there was only Hobbit One ("why?") and also sore at me for laughing at him.