Why is a literary collection called ana?

There is no common literary term or concept called "ana." It's possible you're thinking of something else, or perhaps there's a specific literary collection with that name.

To help clarify, could you please provide more context or information? For example:

* Do you have any more details about the literary collection you're referring to? (e.g., author, title, genre, etc.)

* Is there any other information you remember about it? (e.g., what kind of works are in it, what is it about, etc.)

With more information, I can hopefully help you understand what you're looking for.