Master under servant in great book (4,6)

I believe the answer is:

page-turner

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

(Other definitions for page-turner that I've seen before include "Gripping book" , "'Unputdownable' book" , "Book one can't put down" , "exciting book" .)

I've seen this clue in The Telegraph.

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.