Crossword Genius

Best-seller religiously read (5)

Ross

I believe the answer is:

bible

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

'read' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for bible that I've seen before include "Book for someone swearing?" , "Holy Writ" , "See 12" , "Book of the Scriptures" , "Christian holy book" .)

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