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