This book took a while to get into as I did not like the beginning, fortunately with ever section the book got better. 
 Story starts off with protagonist in the lowest class of a typical unfair totalitarian society and given reason to hate the society and bring it down. Fueled with rage and need for revenge he plans to secretly moves up. 
 About a third into the story it turns into a Lord of the Flies scenario with young adults instead of children. A small group are forced to build a society from scratch with all the emotions, savagery, loyalty and betrayal one expects to find. Fortunately with each section the book got more interested and the protagonist developed additional layers. Eventually the story breaking from the trope and has a satisfactory ending.