Above all don't be judgmental. If your teenager wants to read books you consider junk, that's fine for now. Don't tell her that her choices aren't good enough. Read something together, even if you hate fantasy or science fiction. Watch television together and discuss the plots and characters.
T here are other ways to encourage reading for pleasure.
Create a family book group, or one with friends. Create a family book. If your child needs to find a community service project, help him find one that will involve reading to the elderly or to young children. There is a special challenge to reading aloud because the reader needs to bring the story alive. Reading picture books to young children, will also reconnect him to the stories and other interesting things that happen between the covers of a book.