A cryptic message

Kevin flipped toward the back. Most recent pages were blank, entries cut short. Disappointment weighed until his eyes caught one final line, written deep and forceful: “When intruders arrive, do your Shawshank Redemption.”
Kevin froze, reading it twice. The words chilled him. What did it mean—a warning, a clue, or the rambling of a man slipping into madness?
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