Page-Turner

What does the idiom “page-turner” mean?

Definition:

A page-turner is an exciting book that’s easy to read, a book that’s difficult to put down.

For example:

“When I go to the beach, I don’t want a book that I have to focus closely on—I prefer a real page-turner.”
Stephen King’s novels are page-turners. They may be a thousand pages long, but you can finish them very quickly.