Reading the summary gives you a very accurate idea of what you'll be getting. A lot of the biographical information you can get from Wikipedia or IMDB and the book may have even used the entries from those two websites word for word. I'm not sure. I didn't really check, although it seemed very similar. That could've just been the fact that the information was the same though. The book certainly adds more depth to the biographies of the three actors and the information about their experiences with the Hunger Games movie itself is unique to the book I believe. The pictures are available online as well but just about everything is available on the internet at this point so that's not saying much. The quality of the photos is far better than anything you can get on a computer and if you were to buy a poster of one of the photos it would probably be the same price as this book. Instead, you get a bunch of pictures.
My only disappointment was that the book was only about the three characters. I knew that going in and everybody else should too if they read the title of the book and the summary. I just think they could have made the book bigger and included the actors that played the other named tributes, plus Willow Shields who plays Prim. The adults in the film could be done too but that would probably be too much and it's probably unnecessary since in all likelihood all of the adults have plenty of biographical information out already. The book seems to be meant more to highlight up-and-coming actors (although Josh Hutcherson has been around for a while). I get the feeling that Willow and Amandla Stenberg, who plays Rue, will be legends someday as long as directors and fans let them move on from the child star thing when the time comes. If those two get to play a bunch of different roles as they get older, they should be huge.
Anyway, it's an excellent book for information on the three actors. I just wish there was information about more people.