Season 2 of the series is currently airing, based on the event which occur mostly in the second book, A Clash of Kings. In this book, Jon Snow becomes a central character to the events which are occurring "north of the Wall" where Winter isn't coming, it never left. The good news is that we will be seeing a lot more of Kit (as Jon Snow) because HBO has just announced it has renewed the show for a third season (which will apparently be based on the first half of A Storm of Swords).
The actor, 25, gave an interview to The Daily Beast about his role on the show:
The picture above is from a photo shoot for Men's Journal. The one quibble I have had with the HBO series is that they made the male characters a lot more attractive than I had pictured them in my mind when I read the books (particularly the actors playing Jon Snow, Brandon Stark, Theon Greyjoy and Tyrion Lannister). Not that there's anything wrong with that!
Hat/tip to TowleRoad