I read Sister and loved it! Devoured it, in fact.
Can't wait to get cracking on second book in Hunger Games trilogy... I wasn't sure about Jennifer Lawrence at first, having only seen her in X-Men: First Class (and on the Oscars red carpet) - I thought she looked a bit too voluptuous and sex kitteny. But I recently watched Winter's Bone and based on that, I think she could be pretty darn perfect as Katniss...