"Why Fiction Does It Better"
It turns out that reading fiction may be a surer road to metacognitive development that vocab-heavy non-fiction. Read Liza Zunshine's take on the topic in this article from the Chronicle Review:
What do Peskin and Astington recommend for fostering constructive learning? Reading fiction. "Dramatic tension in stories is created when the various characters have disparate knowledge with regard to the action." ... It turns out that informational texts don't come close to containing the kind of metacognitive complexity so essential to fiction ...
Link to PDF of article