The 100

This book is good because of all the believable characters. It's about a group of juvenile delinquents who get sent down to Earth, which is unpopulated after a nuclear disaster. Some of them are there for a reason- to go to earth with loved ones, sisters, ex-girlfriends... And some of them escaped to go back for loved ones, sisters, ex-boyfriends... 

Can the 100 survive on earth with their limited resources? Can the few who escaped survive on the ship with the plentiful guards?

-Ella-