Recent research in cognitive science, psychology and neuroscience has demonstrated that deep reading—slow, immersive, rich in sensory detail and emotional and moral complexity—is a distinctive experience, different in kind from the mere decoding of words. Although deep reading does not, strictly speaking, require a conventional book, the built-in limits of the printed page are uniquely conducive to the deep reading experience. A book’s lack of hyperlinks, for example, frees the reader from making decisions—Should I click on this link or not?—allowing her to remain fully immersed in the narrative.
That immersion is supported by the way the brain handles language rich in detail, allusion and metaphor: by creating a mental representation that draws on the same brain regions that would be active if the scene were unfolding in real life. The emotional situations and moral dilemmas that are the stuff of literature are also vigorous exercise for the brain, propelling us inside the heads of fictional characters and even, studies suggest, increasing our real-life capacity for empathy.
from "The Case for Preserving the Pleasure of Deep Reading"
by Annie Murphy Paul