For decades, mysterious tiles have appeared in dozens of cities across North and South America, touting a strange -- and strangely consistent -- message. But what are the Toynbee Tiles? What is their purpose and who made them? They don’t want you to read our book.
They don't want you to read our book.:
https://static.macmillan.com/static/fib/stuff-you-should-read/
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