The real reason Americans don't read
The truth is that the decline of reading for pleasure has little to do with the things that teachers, librarians and parents seem to think are causing it. The majority of American adults are literate, and high school English curriculums are meant to teach them to analyze literature, not enjoy it. (It's a wonder even as many as half of Americans still enjoy reading after being subjected to "The Scarlet Letter.") The reasons are more complex than that, and it's not at all clear that better education or higher literacy would change Americans' reading habits.
Unlike, say, watching a movie, reading a book is necessarily a private experience.