At the moment I am about half way through Bill Bryson's A Short History of Nearly Everything. It's so packed full of knowledge that I literally feel my brain expanding. But incredibly readable, unlike the science textbooks we had to read in school.
George R.R. Martin's A Clash of Kings just arrived, so it will likely be the next one I read. Well, either that or Gone Girl (Gillian Flynn) or Brighton Belle (Sara Sheridan). Oh the choices! I can't wait!