Sentences with Closed Book

The mysterious ancient artifact proved to be a closed book, confounding even the seasoned archaeologists.

For the curious teenager, quantum physics remained a closed book, filled with complex equations and abstract concepts.

Understanding the legal jargon in the contract was like reading a closed book for the ordinary citizen.

The encrypted message was akin to a closed book, challenging cryptographers to unravel its hidden meaning.

The complexities of diplomatic negotiations can be a closed book for those unfamiliar with international relations.