I treat rare books like high‑value supplies. I keep them in a climate‑controlled safe, wrapped in acid‑free plastic, and a backup copy in a locked case in the basement. All locations are logged in a spreadsheet and noted in my color‑coded notebooks. I run a 48‑hour evacuation plan just in case. The static radio stays tuned to 0.3 Hz for any frequency shift. Old birthday cards? I file them as classified intel, just in case of a social breach.