[Vocabulary] Repeat the book

[beachboy]

Suppose I am studying German, and the course is divided in 5 books. If I fail the book 4 final tests, is it right to say "I'll have to repeat book 4"? Is there a more natural way to say it?

 

[emsr2d2]

Suppose I am studying German, and the course is divided into 5 books. If I fail the [STRIKE]book 4[/STRIKE] final tests in book 4, is it right to say "I'll have to repeat book 4"? Is there a more natural way to say it?

Your sentence is correct. You could also say "I'll have to do book 4 again".