This may be an unusual opinion, but I read a lot, and I've found non-fiction books to just not be efficient means of educating myself anymore. Most topics can be illustrated and described in far fewer words than a book takes. I get about a third of the way through a lot of books and say "ok I get it", as the author basically just continues to say the same thing in different ways. I'm sure this is incentivized by current publishing structure.
Not only that, but figures and plots provide far more information density than words, and books don't frequently include them in large quantity. I've found scientific literature and a number of very high quality bloggers to be a much more efficient source of reading material.
That's not to say this is always true - biographies in particular seem to have the most consistently large content / page count.