It's not just musicians giving in to demand to go digital. J.D. Salinger's son Matt has agreed to publish e-book versions of the famed author's novels, including The Catcher in the Rye and Franny and Zooey, later this week. Salinger had generally been against technology and was one of the last great 20th-century writers to refuse digital publication, but his son Matt saw this as a matter of keeping his father's work relevant in the modern era. Many people only read on phones and tablets, the younger Salinger told the New York Times -- if there weren't e-book versions, people might not read these classics in the first place.