Ashfall/ Mike Mullen/ 460 pages

If you liked Hunger Games, you will like Ashfall.  This is the story of what it might be like if a supervolcano erupted in Yellowstone.  Alex must learn to survive on his own as he searches for his parents.  Ash is covering the land choking out the sunlight, people are turning on each other, and no one has much food.  This is also very reminiscent of "Life as We Knew It".  It's a great survival story.  And the sequel is due to come out this fall.