When my DS6 was 4 he was reading the early readers (taught himself too), but he loved it when I read chapter books like Charlottes Web, Winnie The Pooh, lots of classic chapter books to him with a bookmark just below the line I was reading so he could follow along. There was no pressure on him, he asked me to do it. We did that for a long time and it was just enough for him to figure out more words so he could read the harder books to himself and it was a lovely, cuddling bonding time for us. He is a voracious reader now!