Well, I read
A brief history of time.
I understood the three first pages and then...
It was interesting, but it's mind-bending stuff.
I think part of the problem with understanding string theory, black holes, gravity waves, multiple universes, infinity, 9 dimensions, etc. is that the physicists start from observations and postulate mathematical theories to explain them. We have no idea of the underpinnings and just get presented with 'the universe is composed of giant strings in multiple dimensions, and matter is actually the vibrations on the strings', or something.
All these loony theories (all but one of them are, by definition) must have a reasonable basis, but we don't see it. Sadly, I don't think my mind is equipped to deal with the maths.
