My HG son at that age only liked a few books, and generally didn't like to be read to much. He really liked fun & silly books like Dr. Suess (Hop on Pop, David books), or about things that he had certain interest in (Blues Clues, Maisy, Shapes) but he was VERY headstrong. I would not focus on his reading, but get him books on his interests, even if it is a TV show. Reading is reading, and read them to him, or let him look at it on his own. Pressuring doesn't really work. Also, early reading is highly linked to early graphic exploration. Get him a small writing pad, and let him scribble, draw, do whatever he wants without much direction.