The Information, James Gleick
A Universe from Nothing, Lawrence Krauss
Abundance, Peter Diamandis
I was also thinking that a non-fiction book with no fluff and no injection of personality/flair from the author is a textbook. There are many outstanding textbooks (like Molecular Biology of the Cell) which offer pure information, but I think commercial non-fiction books are aimed at a more general audience. The author needs to fluff a book up a bit to make the material approachable. I also wonder how some non-fiction books would read if untouched by editors.