There is a little booklet of original papers of relativity published by Dover. In 1915 physicists didn't know about differential geometry or tensors, so Einstein actually had to explain the geodesic equation and all that, and he does it better than most textbooks.

I'm not saying that the subject is easy, but that (as happens so often) it's better to read the original than some thrice-regurgitated version. Of course, the writing of Wheeler is also original and has the benefit of 50+ years of hindsight, but still...

A society committed to the notion that government is always bad will have bad government. And it doesn't have to be that way. — Paul Krugman

My first 'popular' relativity book was the one by Landau, which has lots of cartoons. I got it when I was 10 and it took me quite some years to understand it ;-)

A society committed to the notion that government is always bad will have bad government. And it doesn't have to be that way. — Paul Krugman