At the moment I'm confusing myself by reading Fred Adams's book called Origins of Existence: How Life Emerged in the Universe. Yeah. It is very scientific but, you know, I'm into science. Especially astronomy. So many interesting things in the universe.
Well, that book may not be everyone's first choice but if you really want to know about different dimensions (you may think we live in a 3D-world + time but we're not!) and galaxies and everything concerning our place in space I totally recommend Carl Sagan. This man was genious and in his videos like the one below he explaines difficult but yet fascinating things in the way that is interesting and easy to understand.