are so mentally invigorating, and require such engagement, they make us smarter

neuroscientists have found plenty of proof that reading fiction stimulates all sorts of cognitive areas—not just language regions but also those responsible for coordinating movement and interpreting smells. Because literary books are so mentally invigorating, and require such engagement, they make us smarter than other kinds of reading material, as a 2009 University of Santa Barbara indicated. Researchers found that subjects who read Kafka's "The Country Doctor"—which includes feverish hallucinations from the narrator and surreal elements—performed better on a subsequent learning task than a control group that read a straightforward summary of the story. (They probably enjoyed themselves a lot more while reading, too.)