This book has been on my radar ever since I first heard about this series some author was writing where troubled teens are chosen to take up the mantle of the four horsemen of apocalypse. 
 Now, whenever I think of the four horsemen, I think of a Red Dwarf episode (S6E3 - Gunmen of the Apocalypse, to be specific). Not quite the same as what's put forth here! 
 I like that Jackie Morse Kessler tackles real problems with this novel. The look into Lisa's thoughts as she struggles to deal with her attitude towards food, failing to see that she's pushing herself to the brink of death by not eating enough / over exercising. 
 When Lisa is chosen to become the new Famine, she sees real food problems in the world - problems that go beyond how fat she perceives herself to be - and she struggles to find her inner strength, struggles to be strong enough to help these people with her new powers. 
 The only downside for me was the ending, and this is one that I'm torn about. I see why the author chose the ending she went for, but at the same time I would have preferred the other option simply as the introduction to the next part of the series.