<p>Nonfiction packs a lot more into 300 pages than fiction. Good engaging stuff! And you get to pepper close acquantances with random facts.</p>
<p>Your Inner Fish by Neil Shubin - traces evolutionary history from fish to mammal. In case that sounds boring, it’s got fish[y] pushups.</p>
<p>Mary Roach books (just don’t read all of them at once) Subjects include corpses, the afterlife, and sex (woohoo)</p>
<p>Behavorial economics - or the less snooze-inducing description, how people think and make decisions. Great eye-openers, and they’ll probably change the way you think. Check out Predictably Irrational or Nudge.</p>