A few months ago I launched SpiesInDC - https://spiesindc.com, a mail-based (as in the real mail) subscription service about Cold War history. Subscribers, ahem secret agents, receive packages every few weeks containing reproductions of famous documents, stanps from the USSR, Cuba, Czechoslovakia, coins, and other fun stuff. I keep refining the packages every week to make it better and it is so much fun.
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