Crossword Genius

Book ID (4)

Ross

I believe the answer is:

isbn

'book id' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Another definition for isbn that I've seen is " Literary code".)

I've seen this clue in the Universal, The Times and The Sunday Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.