close the book on something

Origin

The image of 'closing the book' is deeply rooted in the ancient practice of meticulous record-keeping. Imagine a meticulous scribe or an old-world merchant, after countless hours of ledger entries, finally making the last stroke for a financial period or a completed transaction. With a sigh of satisfaction, they would physically snap the heavy, bound book shut, tie its clasps, and shelve it. This definitive physical action—no more entries, no more revisions, the accounts are settled—served as a potent symbol of finality. From these practical origins in commerce and administration, where a closed book meant a finished chapter of business, the phrase transitioned into common parlance as a powerful metaphor for bringing any matter to a decisive and irreversible end, much like shutting the cover on a concluded story.