Sentences with Closed Book

The detective found the encrypted message to be a closed book until he deciphered the code.

The novel's intricate plot and hidden motives made it a closed book for readers until the final chapters unfolded.

Trying to grasp the intricate dance moves felt like a closed book for the beginner ballerina.

Deciphering the intricate legal documents proved to be a closed book for the novice lawyer.

To the amateur astronomer, the vast universe remained a closed book until the powerful telescope revealed its wonders.

Understanding the complex computer programming language was a closed book for the non-tech-savvy individual.

The negotiations between the two countries were a closed book until diplomats unveiled the historic agreement.