I like to read classic literature myself. If you go back far enough in time the content is totally kosher/modest as society had a higher moral standard a couple of hundred years ago. It doesn't have to be heavy/intellectual stuff. Novels from Mark Twain (Huckleberry Fin for instance) or Charles Dickens (Daver Copperfield is my favorite) are really great and charming escapes. For something a bit more recent, Tolkien's the Hobbit is a great read.