The Einstein Theory of Relativity: A Concise Statement | 
pickA short read explaining Einstein‘s theory of relativity.
I found it to be a good summary and easily understandable. No maths are used and mostly it‘s in plain English. It was written in 1920, so gives a historical perspective too - this was just a year after the eclipse experiments verified relativity.
If you come across it in a library and are interested in physics, it might be worth a quick read (but don‘t go out of your way).
6.5/10
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