Whether printed books are superior to, or merely precursors to, screen-transmitted words continues to be controversial.
A subset of that wide-ranging debate is the argument about the physiological differences (?) in the brain when a reader uses a book vs. when a reader uses a screen. This was touched on recently in the form of a survey of some recent books on this (and related) subjects; the survey was written by Thomas Larson and posted at The Rumpus.
Read Larson’s article (and the interesting readers’ comments).