Catching Fire by Suzanne Collins
Collins is wonderful with metaphor. The "mockingjay" that adorns the cover of the book is great. Take this passage:
"A mockingjay is a creature the Capitol never intended to exist. They hadn't counted on the highly controlled jabberjay having the brains to adapt to the wild, to pass on its genetic code, to thrive in a new form. They hadn't anticipated its will to live."
Of course, the similarity between the jabberjay/mockingjay and the people in the districts is not hard to spot. Katniss herself, while oppressed by the capitol and forced to sign up for tesserae to sustain her family after her father dies in a mine explosion, is creative and defiant and hunts illegally in the woods - training that equips her perfectly for the Hunger Games she wins in Collins' previous book.
Overall, I'm impressed with Collins writing. As stated in my review of The Hunger Games, the writing is not juvenile. Although her primary characters are teenagers, they think in a more mature way. Their thoughts and experiences are believable, however, given the hardship they have faced. For example, Katniss has been forced to sustain her family after her father died and her mother fell into a catatonic depression. Further, Katniss has been forced to kill other children to spare her own life in the hunger games. Lastly, as is fleshed out in Catching Fire, Katniss must consider how to preserve her family and friends in light of the Capitol's anger at her rebellion in the hunger games (threatening suicide if she and her fellow tribute from District 12, Peeta, aren't allowed to win the hunger games and live)

