How would you define/interpret the phrase "frozen in time"?

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I am going to publish a new poetry/lyric book soon. I decided the title will be Frozen in Time. Everything is already written. Just need to proof/edit the manuscript a second time. The front cover is done. The back cover I am still working on. I need to come up with a book description to put on it but not sure what to write... How would you define/interpret the phrase "frozen in time"?