Crossword Genius

Books very much spoken of? (7)

Ross

I believe the answer is:

volumes

I'm a little stuck... Click here to teach me more about this clue!

'books' is the definition.
(I know this)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for volumes that I've seen before include "encyclopedia?" , "Books (in a series)" , "Parts of periodical publication" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app