The second part of The Hunger Games we continue the story of Katniss Everdeen, Peeta and Gale. The story continues after Katniss and Peeta won the Hunger Games, and how Katniss' life has changed, or has it. So she gets a new house in the Victors Village, but is she really safe, is her life any better. Not really, she and Peeta are now the poster children for rebellion, which was never their intended plan. Now they are the number one people that the Capitol wants to destroy. Read the book and find out how they plan to do that.
This book was good, but I thought The Hunger Games was a lot better, as is always the case with a series. But it's good anyway, the story still carries the same idea, we still get to feel what the characters feel, and what they go through, and they go though a lot. But it's missing that fire that the first one had. I would recommend reading it right after you finish the first one. Otherwise you might not feel the same connection.
It does leave you hanging a bit, so pick up the Mockingjay right away, a lot of questions from THG are revealed. I found a lot of the plot from the first book repeating, and you will notice months pass in just a few pages, which was a little frustrating. Basically the book lacks the magic that the first one had. And at times you can even expect what will happen, it just didn't pull me in as much as The Hunger Games.
But if you loved the first book you should definitely read this one. And the next one too.